blowup vs blow up

blowup is a noun but blow up is not a noun.

Word	Noun	Adjective	Verb	Adverb
blowup	Yes	No	No	No
blow up	No	No	Yes	No

blowup (noun)	blow up (noun)
a photographic print that has been enlarged
an unrestrained expression of emotion
a violent release of energy caused by a chemical or nuclear reaction

blowup (verb)	blow up (verb)
	make large
	exaggerate or make bigger
	to swell or cause to enlarge
	cause to burst with a violent release of energy
	fill with gas or air
	burst and release energy as through a violent chemical or physical reaction
	add details to
	get very angry and fly into a rage