adumbrate vs sketch out

adumbrate and sketch out both are verbs.

Word	Noun	Adjective	Verb	Adverb
adumbrate	No	No	Yes	No
sketch out	No	No	Yes	No

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

adumbrate: describe roughly or briefly or give the main points or summary of
sketch out: indicate roughly

Other hyponyms of adumbrate include block out.

adumbrate (verb)	sketch out (verb)
describe roughly or briefly or give the main points or summary of	indicate roughly
give to understand