drop out vs dropout

drop out is not a noun while dropout is a noun.

Word	Noun	Adjective	Verb	Adverb
drop out	No	No	Yes	No
dropout	Yes	No	No	No

drop out (noun)	dropout (noun)
	someone who quits school before graduation
	someone who withdraws from a social group or environment

drop out (verb)	dropout (verb)
give up in the face of defeat of lacking hope; admit defeat
leave school or an educational program prematurely
withdraw from established society, especially because of disillusion with conventional values