piece vs confuse

piece is a noun but confuse is not a noun.

Word	Noun	Adjective	Verb	Adverb
piece	Yes	No	Yes	No
confuse	No	No	Yes	No

As verbs, confuse is a hyponym of piece; that is, confuse is a word with a more specific, narrower meaning than piece:

Other hyponyms of piece include comfit, confect, confection, jumble, mix up, reassemble, configure, compound, rig up.

piece (noun)	confuse (noun)
a separate part of a whole
game equipment consisting of an object used in playing certain board games
a portable gun
a work of art of some artistic value
an item that is an instance of some type
a distance
a musical work that has been created
an artistic or literary composition
an instance of some kind
a serving that has been cut from a larger portion
a portion of a natural object
a share of something
a period of indeterminate length (usually short) marked by some action or condition

piece (verb)	confuse (verb)
repair by adding pieces	make unclear, indistinct, or blurred
eat intermittently; take small bites of	mistake one thing for another
join during spinning	be confusing or perplexing to; cause to be unable to think clearly
to join or unite the pieces of	assemble without order or sense
create by putting components or members together	cause to feel embarrassment