homo vs human being

homo and human being both are nouns.

Word	Noun	Adjective	Verb	Adverb
homo	Yes	No	No	No
human being	Yes	No	No	No

As nouns, homo and human being are synonyms defined as:

homo and human being: any living or extinct member of the family Hominidae characterized by superior intelligence, articulate speech, and erect carriage

Other synonyms of homo include human, man.

homo (noun)	human being (noun)
any living or extinct member of the family Hominidae characterized by superior intelligence, articulate speech, and erect carriage	any living or extinct member of the family Hominidae characterized by superior intelligence, articulate speech, and erect carriage
someone who is sexually attracted to persons of the same sex