but, butt

But or but means except; on the contrary; yet--
We ate all but one slice of pizza.
We ordered a pizza, but it never got here.
We went out early, but came home late.

Butt or butt ( rhymes with but ) means the end or bottom of something--
The yard is full of cigarette butts.
Butt may mean the target of a joke or sarcasm--
That poor guy is always the butt of their jokes.
Butt may mean to strike with one's head--
The goat butted the gate until it opened.
Butt is also a kind of fish; a kind of wall on a target range, a type of barrel for wine or beer, or a slang term for a person's behind.

To butt things together means to join them end to end.
To "butt in" means to interfere in someone else's business or conversation
To "butt in line" means  take a place in line ahead of where you belong.
To "butt out" means to mind one's own business.

Now that you know that, you can say--
"He smoked all but the butt."
"We butted in line, but no one noticed."

Note--"abut" ( one word )  means to be joined at the edge or to touch at the ends--
The fence ends where it abuts the wall.
Note #2--a "butte" ( rhymes with shoot ) is a western word for a type of hill--
He could see them riding over the butte from a great distance.
Not to be confused with the common slang--"it's a beaut", ( also rhymes with shoot ) meaning it's great--
I like your new car. It's a beaut!