metamorphosis vs metamorphous

metamorphosis is a noun but metamorphous is not a noun.

Word	Noun	Adjective	Verb	Adverb
metamorphosis	Yes	No	No	No
metamorphous	No	Yes	No	No

metamorphosis (noun)	metamorphous (noun)
a complete change of physical form or substance especially as by magic or witchcraft
a striking change in appearance or character or circumstances
the marked and rapid transformation of a larva into an adult that occurs in some animals

metamorphosis (adjective)	metamorphous (adjective)
	of or relating to metamorphosis (especially of rocks)
	produced by metamorphosis