manifold vs proliferate

manifold is a noun but proliferate is not a noun.

Word	Noun	Adjective	Verb	Adverb
manifold	Yes	Yes	Yes	No
proliferate	No	No	Yes	No

As verbs, proliferate is a hyponym of manifold; that is, proliferate is a word with a more specific, narrower meaning than manifold:

Other hyponyms of manifold include double, duplicate, treble, triple, quadruple, quintuple.

manifold (noun)	proliferate (noun)
a pipe that has several lateral outlets to or from other pipes
a set of points such as those of a closed surface or an analogue in three or more dimensions
a lightweight paper used with carbon paper to make multiple copies

manifold (adjective)	proliferate (adjective)
many and varied; having many features or forms

manifold (verb)	proliferate (verb)
make multiple copies of	grow rapidly
combine or increase by multiplication	cause to grow or increase rapidly