How to get continuous reference to a GameObject's position?

Say, its a 2D word falling typing game, the words are individual GameObjects. How do I check the y position of each word GameObject falling down the scene and then trigger the Game Over text when it passes a certain y position?

Word GameObject Prefab

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEngine.UI;
 [System.Serializable]
 public class Word {
 
     public string word;
     private int typeIndex;
     WordDisplay display;
 
     public Word (string _word, WordDisplay _display)
     {
         word = _word;
         typeIndex = 0;
         display = _display;
         display.SetWord(word);
     }
 
     public char GetNextLetter ()
     {
         return word[typeIndex];
     }
 
     public void TypeLetter ()
     {
         typeIndex++;
         display.RemoveLetter();
     }
 
     public bool WordTyped ()
     {
         bool wordTyped = (typeIndex >= word.Length);
         if (wordTyped)
         {
             display.RemoveWord();
         }
         return wordTyped;
     }
 
     void Update()
     {
         if(Transform.position.y == -328.1865)
         {
             GameOver.turnon = true;
         }
     }
 }
 

Event script

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEngine.UI;
 public class GameOver : MonoBehaviour
 {
     public Text gameOverText;
     public static bool turnon;
     // Start is called before the first frame update
     void Start()
     {
         gameOverText = GetComponent<Text>();
         gameOverText.gameObject.SetActive(false);
         turnon = false;
         
     }
     void Update()
     {
         if (turnon == true)
         {
             gameOverText.gameObject.SetActive(true);
         }
         
     }
 }