If you're referring to the stuff coming out of a tailpipe, it's a noun (person, place, thing, or idea).
It could be a verb under some circumstances (my children exhaust me).
Slap an 'ing' on and you could have a gerund.
Not quite as versatile as 'smurf', but a fun word nonetheless.
adverb
what part of speech is beneath
i want to know what part of speech is camping
The part of speech is a adjective
Oppose is a verb.
The part of speech for this particular word is a noun.
part of speech
The part of speech for "answer" is a noun.
adverb
what part of speech is beneath
The part of speech for "unfamiliar" is an adjective.
The part of speech of "came" is a verb.
The part of speech for "twirl" is a verb.
The part of speech for "explicit" is an adjective.
The part of speech for "indefinite" is an adjective.
The part of speech for "lecturer" is a noun.
The part of speech for "breezy" is an adjective.