allocation vs allocate

allocation is a noun but allocate is not a noun.

Word	Noun	Adjective	Verb	Adverb
allocation	Yes	No	No	No
allocate	No	No	Yes	No

allocation (noun)	allocate (noun)
the act of distributing by allotting or apportioning; distribution according to a plan
(computer science) the assignment of particular areas of a magnetic disk to particular data or instructions
a share set aside for a specific purpose

allocation (verb)	allocate (verb)
	distribute according to a plan or set apart for a special purpose