adumbrate vs hint

adumbrate is not a noun while hint is a noun.

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

As verbs, hint is a hypernym of adumbrate; that is, hint is a word with a broader meaning than adumbrate:

Other hypernyms of adumbrate include suggest.

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

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