set off vs countervail

set off and countervail both are verbs.

Word	Noun	Adjective	Verb	Adverb
set off	No	No	Yes	No
countervail	No	No	Yes	No

As verbs, countervail is a hyponym of set off; that is, countervail is a word with a more specific, narrower meaning than set off:

Other hyponyms of set off include counteract, counterbalance, neutralize.

set off (verb)	countervail (verb)
cause to burst with a violent release of energy	oppose and mitigate the effects of by contrary actions
set in motion or cause to begin	compensate for or counterbalance
direct attention to, as if by means of contrast
provoke or stir up
put in motion or move to act
depart for someplace
make up for