android vs mechanical man

android and mechanical man both are nouns.

Word	Noun	Adjective	Verb	Adverb
android	Yes	No	No	No
mechanical man	Yes	No	No	No

As nouns, android and mechanical man are synonyms defined as:

Other synonyms of android include humanoid.

android (noun)	mechanical man (noun)
an automaton that resembles a human being	an automaton that resembles a human being
An operating system from Google for mobile devices