suspicion vs notion

suspicion and notion both are nouns.

Word	Noun	Adjective	Verb	Adverb
suspicion	Yes	No	No	No
notion	Yes	No	No	No

As nouns, notion is a hypernym of suspicion; that is, notion is a word with a broader meaning than suspicion:

Other hypernyms of suspicion include belief, feeling, impression, opinion.

suspicion (noun)	notion (noun)
being of a suspicious nature	(usually plural) small personal articles or clothing or sewing items
doubt about someone's honesty	a general inclusive concept
an impression that something might be the case	an odd or fanciful or capricious idea
the state of being suspected	a vague idea in which some confidence is placed