stag party vs smoker

stag party and smoker both are nouns.

Word	Noun	Adjective	Verb	Adverb
stag party	Yes	No	No	No
smoker	Yes	No	No	No

As nouns, stag party and smoker are synonyms defined as:

stag party and smoker: a party for men only (or one considered suitable for men only)

stag party (noun)	smoker (noun)
a party for men only (or one considered suitable for men only)	a passenger car for passengers who wish to smoke
	a party for men only (or one considered suitable for men only)
	a person who smokes tobacco