mane vs head of hair

mane and head of hair both are nouns.

Word	Noun	Adjective	Verb	Adverb
mane	Yes	No	No	No
head of hair	Yes	No	No	No

As nouns, mane and head of hair are synonyms defined as:

mane and head of hair: growth of hair covering the scalp of a human being

mane (noun)	head of hair (noun)
long coarse hair growing from the crest of the animal's neck	growth of hair covering the scalp of a human being
growth of hair covering the scalp of a human being