homoiotherm vs homoiothermic

homoiotherm is a noun but homoiothermic is not a noun.

Word	Noun	Adjective	Verb	Adverb
homoiotherm	Yes	No	No	No
homoiothermic	No	Yes	No	No

homoiotherm (noun)	homoiothermic (noun)
an animal that has a body temperature that is relatively constant and independent of the environmental temperature

homoiotherm (adjective)	homoiothermic (adjective)
	of birds and mammals; having constant and relatively high body temperature