suspicion vs incertitude

suspicion and incertitude both are nouns.

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

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

Other hypernyms of suspicion include doubt, doubtfulness, dubiety, dubiousness, uncertainty.

suspicion (noun)	incertitude (noun)
being of a suspicious nature	the state of being unsure of something
doubt about someone's honesty
an impression that something might be the case
the state of being suspected