plenteous vs plentiful

plenteous and plentiful both are adjectives.

Word	Noun	Adjective	Verb	Adverb
plenteous	No	Yes	No	No
plentiful	No	Yes	No	No

As adjectives, plenteous and plentiful are synonyms defined as:

Other synonyms of plenteous include ample, copious, rich.

plenteous (adjective)	plentiful (adjective)
affording an abundant supply	producing in abundance
	affording an abundant supply
	existing in great number or quantity