hint vs adumbrate

hint is a noun but adumbrate is not a noun.

Word	Noun	Adjective	Verb	Adverb
hint	Yes	No	Yes	No
adumbrate	No	No	Yes	No

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

Other hyponyms of hint include insinuate, intimate, clue in, advert, allude, touch.

hint (noun)	adumbrate (noun)
an indirect suggestion
a slight indication
an indication of potential opportunity
a slight but appreciable amount
a just detectable amount

hint (verb)	adumbrate (verb)
drop a hint; intimate by a hint	describe roughly or briefly or give the main points or summary of
	give to understand