human being vs homo

human being and homo both are nouns.

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

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

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

Other synonyms of human being include human, man.

human being (noun)	homo (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