flame vs flame up

flame is a noun but flame up is not a noun.

Word	Noun	Adjective	Verb	Adverb
flame	Yes	No	Yes	No
flame up	No	No	Yes	No

flame (noun)	flame up (noun)
the process of combustion of inflammable materials producing heat and light and (often) smoke

flame (verb)	flame up (verb)
criticize harshly, usually via an electronic medium	become ignited
be in flames or aflame	burn brightly
shine with a sudden light