set off vs lift off

set off and lift off both are verbs.

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

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

Other hyponyms of set off include take off, roar off, blaze, blaze out, sally forth, sally out.

set off (verb)	lift off (verb)
cause to burst with a violent release of energy	depart from the ground
set in motion or cause to begin
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