polydactyl vs polydactylous

polydactyl and polydactylous both are adjectives.

Word	Noun	Adjective	Verb	Adverb
polydactyl	No	Yes	No	No
polydactylous	No	Yes	No	No

As adjectives, polydactyl and polydactylous are synonyms defined as:

polydactyl and polydactylous: of or relating to a person (or other vertebrate) having more than the normal number of digits

polydactyl (adjective)	polydactylous (adjective)
of or relating to a person (or other vertebrate) having more than the normal number of digits	of or relating to a person (or other vertebrate) having more than the normal number of digits