Melee Weapon Collision addjust health

Hey guys, its probably pretty simple, I have a zombie, a player, and when I click an animation plays swinging the machete, I want the machete to when colliding with the zombie addjust its health by -100 ie killing it.

Player Script (Dont think you need this but its for reference. using UnityEngine; using System.Collections;

 // Require these components when using this script
 [RequireComponent(typeof (Animator))]
 [RequireComponent(typeof (CapsuleCollider))]
 [RequireComponent(typeof (Rigidbody))]
 public class JeffControl : MonoBehaviour
 {
     [System.NonSerialized]                    
     public float lookWeight;                    // the amount to transition when using head look
     
     [System.NonSerialized]
     public Transform enemy;                        // a transform to Lerp the camera to during head look
     
     public float animSpeed = 1.5f;                // a public setting for overall animator animation speed
     public float lookSmoother = 3f;                // a smoothing setting for camera motion
     public bool useCurves;                        // a setting for teaching purposes to show use of curves
     
     public int maxhealth = 100;
     public int curhealth = 100;
     public float healthbarlength;
     
 
     private Animator anim;                            // a reference to the animator on the character
     private AnimatorStateInfo currentBaseState;            // a reference to the current state of the animator, used for base layer
     private AnimatorStateInfo layer2CurrentState;    // a reference to the current state of the animator, used for layer 2
     private CapsuleCollider col;                    // a reference to the capsule collider of the character
     
     
     static int locoState = Animator.StringToHash("Base Layer.Locomotion");            // these integers are references to our animator's states
     static int jumpState = Animator.StringToHash("Base Layer.Jump");                // and are used to check state for various actions to occur
     static int jumpDownState = Animator.StringToHash("Base Layer.JumpDown");        // within our FixedUpdate() function below
     static int fallState = Animator.StringToHash("Base Layer.Fall");
     static int rollState = Animator.StringToHash("Base Layer.Roll");
     static int attackState = Animator.StringToHash("Layer2.Attack");
     
 
     void Start ()
     {
         // initialising reference variables
         healthbarlength = Screen.width / 2;
         anim = GetComponent<Animator>();                      
         col = GetComponent<CapsuleCollider>();                
     }
     
     
     void FixedUpdate ()
     {
         AddjustCurrentHealth(0);
         float h = Input.GetAxis("Horizontal");                // setup h variable as our horizontal input axis
         float v = Input.GetAxis("Vertical");                // setup v variables as our vertical input axis
         anim.SetFloat("Speed", v);                            // set our animator's float parameter 'Speed' equal to the vertical input axis                
         anim.SetFloat("Direction", h);                         // set our animator's float parameter 'Direction' equal to the horizontal input axis        
         anim.speed = animSpeed;                                // set the speed of our animator to the public variable 'animSpeed'
         anim.SetLookAtWeight(lookWeight);                    // set the Look At Weight - amount to use look at IK vs using the head's animation
         currentBaseState = anim.GetCurrentAnimatorStateInfo(0);    // set our currentState variable to the current state of the Base Layer (0) of animation
         
         if(anim.layerCount ==2)        
             layer2CurrentState = anim.GetCurrentAnimatorStateInfo(1);    // set our layer2CurrentState variable to the current state of the second Layer (1) of animation
         
         // STANDARD JUMPING
         
         // if we are currently in a state called Locomotion (see line 25), then allow Jump input (Space) to set the Jump bool parameter in the Animator to true
         if (currentBaseState.nameHash == locoState)
         {
             if(Input.GetButtonDown("Jump"))
             {
                 anim.SetBool("Jump", true);
             }
         }
         
         // if we are in the jumping state... 
         else if(currentBaseState.nameHash == jumpState)
         {
             //  ..and not still in transition..
             if(!anim.IsInTransition(0))
             {
                 if(useCurves)
                     // ..set the collider height to a float curve in the clip called ColliderHeight
                     col.height = anim.GetFloat("ColliderHeight");
                 
                 // reset the Jump bool so we can jump again, and so that the state does not loop 
                 anim.SetBool("Jump", false);
             }
             
             // Raycast down from the center of the character.. 
             Ray ray = new Ray(transform.position + Vector3.up, -Vector3.up);
             RaycastHit hitInfo = new RaycastHit();
             
             if (Physics.Raycast(ray, out hitInfo))
             {
                 // ..if distance to the ground is more than 1.75, use Match Target
                 if (hitInfo.distance > 1.75f)
                 {
                     
                     // MatchTarget allows us to take over animation and smoothly transition our character towards a location - the hit point from the ray.
                     // Here we're telling the Root of the character to only be influenced on the Y axis (MatchTargetWeightMask) and only occur between 0.35 and 0.5
                     // of the timeline of our animation clip
                     anim.MatchTarget(hitInfo.point, Quaternion.identity, AvatarTarget.Root, new MatchTargetWeightMask(new Vector3(0, 1, 0), 0), 0.35f, 0.5f);
                 }
             }
         }
             
         // JUMP DOWN AND ROLL 
         
         // if we are jumping down, set our Collider's Y position to the float curve from the animation clip - 
         // this is a slight lowering so that the collider hits the floor as the character extends his legs
         else if (currentBaseState.nameHash == jumpDownState)
         {
             col.center = new Vector3(0, anim.GetFloat("ColliderY"), 0);
         }
         
         // if we are falling, set our Grounded boolean to true when our character's root 
         // position is less that 0.6, this allows us to transition from fall into roll and run
         // we then set the Collider's Height equal to the float curve from the animation clip
         else if (currentBaseState.nameHash == fallState)
         {
             col.height = anim.GetFloat("ColliderHeight");
         }
         
         // if we are in the roll state and not in transition, set Collider Height to the float curve from the animation clip 
         // this ensures we are in a short spherical capsule height during the roll, so we can smash through the lower
         // boxes, and then extends the collider as we come out of the roll
         // we also moderate the Y position of the collider using another of these curves on line 128
         else if (currentBaseState.nameHash == rollState)
         {
             if(!anim.IsInTransition(0))
             {
                 if(useCurves)
                     col.height = anim.GetFloat("ColliderHeight");
                 
                 col.center = new Vector3(0, anim.GetFloat("ColliderY"), 0);
                 
             }
         }
         // ATTACK
         
         if(Input.GetMouseButtonUp(0))
         {
             anim.SetBool("Attack", true);
         }
         // if we enter the attacking state, reset the bool to let us attack again in future
         if(layer2CurrentState.nameHash == attackState)
         {
             anim.SetBool("Attack", false);
         }
     }
     
     // HEALTH SYSTEM
     
     void OnGUI () {
         GUI.Box(new Rect(10, 10, healthbarlength, 20), curhealth + "/" + maxhealth);
     }
     public void AddjustCurrentHealth(int adj) {
         curhealth += adj;
         
         if(curhealth < 0)
             curhealth = 0;
         
         if(curhealth > maxhealth)
             curhealth = maxhealth;
         
         if(maxhealth < 1)
             maxhealth = 1;
         
         healthbarlength = (Screen.width / 2) * (curhealth / (float)maxhealth);
     }
 }
 

Machete Script using UnityEngine; using System.Collections;

 public class MacheteContol : MonoBehaviour {
 
     // Use this for initialization
     void Start () {
     
     }
     
     // Update is called once per frame
     void Update () {
     
     }
     
     public void OnCollisionEnter(collision Collision) 
     {
         EnemyHealth eh = (EnemyHealth)collision.getcomponent("ZombieControl");
         eh.AddjustCurrentHealth(-100);
     }
 }

And of course zombie script

 using System.Collections;
 
 public class ZombieControl : MonoBehaviour {
     
     public int maxhealth = 100;
     public int curhealth = 100;
 //    public float healthbarlength;
 
     // Use this for initialization
     void Start () {
     
     }
     
     // Update is called once per frame
     void FixedUpdate () {
         AddjustCurrentHealth(0);
     }
     
     // Health System
     
         void OnGUI () {
 //        GUI.Box(new Rect(10, 10, healthbarlength, 20), curhealth + "/" + maxhealth);
     }
     public void AddjustCurrentHealth(int adj) {
         curhealth += adj;
         
         if(curhealth < 0)
             curhealth = 0;
         
         if(curhealth > maxhealth)
             curhealth = maxhealth;
         
         if(maxhealth < 1)
             maxhealth = 1;
         
         if(curhealth == 0)
         {
             Destroy(gameObject);
         }
     }
 }

I'm getting an error that says: Assets/Scripts/MacheteContol.cs(16,38): error CS0246: The type or namespace name `collision' could not be found. Are you missing a using directive or an assembly reference?

However with a bit of fiddiling I can get this error to go away, that's not the problem, basically the script is broken, and I don't know how to fix it.

FOR REFERENCE: the machete collision is set as trigger.