cyborg vs bionic man

cyborg and bionic man both are nouns.

Word	Noun	Adjective	Verb	Adverb
cyborg	Yes	No	No	No
bionic man	Yes	No	No	No

As nouns, bionic man is a hyponym of cyborg; that is, bionic man is a word with a more specific, narrower meaning than cyborg:

cyborg: a human being whose body has been taken over in whole or in part by electromechanical devices
bionic man: a male human being whose body has been taken over in whole or in part by electromechanical devices

Other hyponyms of cyborg include bionic woman.

cyborg (noun)	bionic man (noun)
a human being whose body has been taken over in whole or in part by electromechanical devices	a male human being whose body has been taken over in whole or in part by electromechanical devices