ample vs sufficiency

ample is not a noun while sufficiency is a noun.

Word	Noun	Adjective	Verb	Adverb
ample	No	Yes	No	No
sufficiency	Yes	No	No	No

ample (noun)	sufficiency (noun)
	the quality of being sufficient for the end in view
	an adequate quantity; a quantity that is large enough to achieve a purpose
	sufficient resources to provide comfort and meet obligations

ample (adjective)	sufficiency (adjective)
more than enough in size or scope or capacity
affording an abundant supply
fairly large in size