automaton vs humanoid

automaton and humanoid both are nouns.

Word	Noun	Adjective	Verb	Adverb
automaton	Yes	No	No	No
humanoid	Yes	No	No	No

As nouns, humanoid is a hyponym of automaton; that is, humanoid is a word with a more specific, narrower meaning than automaton:

Other hyponyms of automaton include android, mechanical man.

automaton (noun)	humanoid (noun)
a mechanism that can move automatically	an automaton that resembles a human being
a machine that operates on its own without the need for human control
someone who acts or responds in a mechanical or apathetic way