The difference between words are their meanings behind them. Some words sound the same, but all words in the dictionary have a different meaning behind them.
These words are called homonyms. Here are few examples of homonyms with an explanation of what they mean:
There- over there,”hey Cade, look over there!”
Their- that’s their bike,”Their bike looks good.”
They’re – they’re awesome photos,(they are.)
Two- the number two,”I’ve got two feet.”
Too- in addition, “I like him. “me too.”
To- used to express motion when direction specific location.
Peace- no war, no conflict, civil. “This is good, we’re at peace with one and other.”
Piece- a piece of food, material,”can I have a piece of that cake.”
I hope that this can help clear some misunderstandings with these words.