decline vs inflame

decline is a noun but inflame is not a noun.

Word	Noun	Adjective	Verb	Adverb
decline	Yes	No	Yes	No
inflame	No	No	Yes	No

As verbs, inflame is a hyponym of decline; that is, inflame is a word with a more specific, narrower meaning than decline:

decline (noun)	inflame (noun)
a downward slope or bend
a gradual decrease; as of stored charge or current
change toward something smaller or lower
a condition inferior to an earlier condition; a gradual falling off from a better state; decline

decline (verb)	inflame (verb)
grow smaller	become inflamed; get sore
grow worse	cause inflammation in
show unwillingness towards	arouse or excite feelings and passions
inflect for number, gender, case, etc.	cause to start burning
go down	catch fire
fall in value
not accept as true