set out vs roar off

set out and roar off both are verbs.

Word	Noun	Adjective	Verb	Adverb
set out	No	No	Yes	No
roar off	No	No	Yes	No

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

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

set out (verb)	roar off (verb)
take the first step or steps in carrying out an action	leave at high speed making a loud sound
lay out orderly or logically in a line or as if in a line
depart for someplace