theism vs polytheism

theism and polytheism both are nouns.

Word	Noun	Adjective	Verb	Adverb
theism	Yes	No	No	No
polytheism	Yes	No	No	No

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

Other hyponyms of theism include monotheism, pantheism, panentheism, pandeism, pantheism.

theism (noun)	polytheism (noun)
the doctrine or belief in the existence of a God or gods	belief in multiple Gods