Yes, the noun 'couch' is a common noun, a general word for a type of furniture.
The word 'couch' is also a verb.
I've got my PC and my comfy couch.
Common noun
Yes
The couch said not to bunt but the player still did!
Don't throw out your old couch; you can still get it reupholstered.
use it by saying- how can you use the word ebullient in a sentence?
Just use it! Or do you mean, can you use the word beheld in a sentence.
You can use the word feces in a sentence to mean excrement.
It was Saturday and I was relaxing on the couch
I rolled the ball in a perfect round around the table.
Bobby ate the raisin he found in the couch
The couch said not to bunt but the player still did!
Don't throw out your old couch; you can still get it reupholstered.
the chipmunk left a pelt on the couch when it got scared
This is a sectional couch.
easy just put my brother is such a couch potatoe
You can use the word "refurbish" a the sentence like, "I can refurbish this old table in no time."
The boy ribbed the couch.
This is a cozily couch for me
This couch is very plush!