The name 'gameObject' does not exist in the current context

I can’t understand why my script is not working..I don’t get why this is wrong..this is my script code below.

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class k : MonoBehaviour
{
void OnTriggerEnter(Collider collider)
    {
        if(collider.gameObject.name == "holms")
        {
            GameVariables.keyCount+=2;
            Destroy(gameobject);
        }
    }
}

I was searching the internet to find similar issue and I find similar threads but not similar to this. It different from the other post here or in google search.

>Solution :

You mis-typed Destroy(gameObject)