unmanliness vs effeminacy

unmanliness and effeminacy both are nouns.

Word	Noun	Adjective	Verb	Adverb
unmanliness	Yes	No	No	No
effeminacy	Yes	No	No	No

As nouns, unmanliness and effeminacy are synonyms defined as:

unmanliness and effeminacy: the trait of being effeminate (derogatory of a man)

Other synonyms of unmanliness include effeminateness, sissiness, softness, womanishness.

unmanliness (noun)	effeminacy (noun)
the trait of being effeminate (derogatory of a man)	the trait of being effeminate (derogatory of a man)