flare up vs kindle

flare up and kindle both are verbs.

Word	Noun	Adjective	Verb	Adverb
flare up	No	No	Yes	No
kindle	No	No	Yes	No

As verbs, kindle is a hyponym of flare up; that is, kindle is a word with a more specific, narrower meaning than flare up:

Other hyponyms of flare up include inflame.

flare up (verb)	kindle (verb)
erupt or intensify suddenly	call forth (emotions, feelings, and responses)
ignite quickly and suddenly, especially after having died down	cause to start burning
	catch fire