flaming vs crashing

flaming is a noun but crashing is not a noun.

Word	Noun	Adjective	Verb	Adverb
flaming	Yes	Yes	No	No
crashing	No	Yes	No	No

As adjectives, flaming and crashing are synonyms defined as:

Other synonyms of flaming include bally, blinking, bloody, blooming, fucking.

flaming (noun)	crashing (noun)
the process of combustion of inflammable materials producing heat and light and (often) smoke

flaming (adjective)	crashing (adjective)
passionate or quick-tempered	informal intensifiers
informal intensifiers