passive vs supine

passive is a noun but supine is not a noun.

Word	Noun	Adjective	Verb	Adverb
passive	Yes	Yes	No	No
supine	No	Yes	No	No

passive (noun)	supine (noun)
the voice used to indicate that the grammatical subject of the verb is the recipient (not the source) of the action denoted by the verb

passive (adjective)	supine (adjective)
lacking in energy or will	passive as a result of indolence or indifference
expressing that the subject of the sentence is the patient of the action denoted by the verb	lying face upward
peacefully resistant in response to injustice