ample vs copious

ample and copious both are adjectives.

Word	Noun	Adjective	Verb	Adverb
ample	No	Yes	No	No
copious	No	Yes	No	No

As adjectives, ample and copious are synonyms defined as:

Other synonyms of ample include plenteous, plentiful, rich.

ample (adjective)	copious (adjective)
more than enough in size or scope or capacity	affording an abundant supply
affording an abundant supply	large in number or quantity (especially of discourse)
fairly large in size