assign vs assignment

assign is not a noun while assignment is a noun.

Word	Noun	Adjective	Verb	Adverb
assign	No	No	Yes	No
assignment	Yes	No	No	No

assign (noun)	assignment (noun)
	a duty that you are assigned to perform (especially in the armed forces)
	the act of putting a person into a non-elective position
	the act of distributing something to designated places or persons
	an undertaking that you have been assigned to do (as by an instructor)
	the instrument by which a claim or right or interest or property is transferred from one person to another
	(law) a transfer of property by deed of conveyance

assign (verb)	assignment (verb)
select something or someone for a specific purpose
attribute or credit to
decide as to where something belongs in a scheme
attribute or give
transfer one's right to
give out
make undue claims to having
give an assignment to (a person) to a post, or assign a task to (a person)