inspire vs sniff

inspire is not a noun while sniff is a noun.

Word	Noun	Adjective	Verb	Adverb
inspire	No	No	Yes	No
sniff	Yes	No	Yes	No

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

Other hyponyms of inspire include aspirate, sniffle, snivel, snuffle, snuff, drag, draw, puff, huff, snort.

inspire (noun)	sniff (noun)
	sensing an odor by inhaling through the nose

inspire (verb)	sniff (verb)
draw in (air)	inhale audibly through the nose
fill with revolutionary ideas	perceive by inhaling through the nose
serve as the inciting cause of
spur on or encourage especially by cheers and shouts
supply the inspiration for
heighten or intensify