sensing vs smelling

sensing and smelling both are nouns.

Word	Noun	Adjective	Verb	Adverb
sensing	Yes	No	No	No
smelling	Yes	Yes	No	No

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

Other hyponyms of sensing include look, looking, looking at, hearing, listening, lipreading, taste, tasting, smell.

sensing (noun)	smelling (noun)
becoming aware of something via the senses	the act of perceiving the odor of something
the perception that something has occurred or some state exists

sensing (adjective)	smelling (adjective)
	(used with `of' or `with') noticeably odorous