disapprove vs reject

disapprove is not a noun while reject is a noun.

Word	Noun	Adjective	Verb	Adverb
disapprove	No	No	Yes	No
reject	Yes	No	Yes	No

As verbs, disapprove and reject are synonyms defined as:

disapprove (noun)	reject (noun)
	the person or thing that is rejected or set aside as inferior in quality

disapprove (verb)	reject (verb)
consider bad or wrong	not accept something given or offered
deem wrong or inappropriate	dismiss from consideration or a contest
	deem wrong or inappropriate
	reject with contempt
	not accept as true
	refuse entrance or membership
	resist immunologically the introduction of some foreign tissue or organ