male vs manful

male is a noun but manful is not a noun.

Word	Noun	Adjective	Verb	Adverb
male	Yes	Yes	No	No
manful	No	Yes	No	No

As adjectives, male and manful are synonyms defined as:

Other synonyms of male include manlike, manly, virile.

male (noun)	manful (noun)
an animal that produces gametes (spermatozoa) that can fertilize female gametes (ova)
a person who belongs to the sex that cannot have babies

male (adjective)	manful (adjective)
being the sex (of plant or animal) that produces gametes (spermatozoa) that perform the fertilizing function in generation	possessing qualities befitting a man
for or pertaining to or composed of men or boys	characteristic of a man
characteristic of a man