vapor vs smoking

vapor and smoking both are nouns.

Word	Noun	Adjective	Verb	Adverb
vapor	Yes	No	No	No
smoking	Yes	Yes	No	No

As nouns, smoking is a hyponym of vapor; that is, smoking is a word with a more specific, narrower meaning than vapor:

vapor: the process of becoming a vapor
smoking: a hot vapor containing fine particles of carbon being produced by combustion

Other hyponyms of vapor include boiling, clouding, clouding up, smoke.

vapor (noun)	smoking (noun)
the process of becoming a vapor	the act of smoking tobacco or other substances
a visible suspension in the air of particles of some substance	a hot vapor containing fine particles of carbon being produced by combustion

vapor (adjective)	smoking (adjective)
	emitting smoke in great volume