segregate vs desegregate

segregate is a noun but desegregate is not a noun.

Word	Noun	Adjective	Verb	Adverb
segregate	Yes	No	Yes	No
desegregate	No	No	Yes	No

segregate (noun)	desegregate (noun)
someone who is or has been segregated

segregate (verb)	desegregate (verb)
separate or isolate (one thing) from another and place in a group apart from others	open (a place) to members of all races and ethnic groups
divide from the main body or mass and collect
separate by race or religion; practice a policy of racial segregation