stir up vs ignite

stir up and ignite both are verbs.

Word	Noun	Adjective	Verb	Adverb
stir up	No	No	Yes	No
ignite	No	No	Yes	No

As verbs, stir up and ignite are synonyms defined as:

Other synonyms of stir up include fire up, heat, inflame, wake.

stir up (verb)	ignite (verb)
provoke or stir up	start or maintain a fire in
change the arrangement or position of	arouse or excite feelings and passions
arouse or excite feelings and passions	cause to start burning; subject to fire or great heat
try to stir up public opinion	start to burn or burst into flames