sniffer vs actor

sniffer and actor both are nouns.

Word	Noun	Adjective	Verb	Adverb
sniffer	Yes	No	No	No
actor	Yes	No	No	No

As nouns, actor is a hypernym of sniffer; that is, actor is a word with a broader meaning than sniffer:

Other hypernyms of sniffer include doer, worker.

sniffer (noun)	actor (noun)
a person who sniffs	a theatrical performer
	a person who acts and gets things done