source: A Noob's Guide to Anime Cliches - OH! Press

PLENTIFUL, AMPLE, ABUNDANT, COPIOUS mean more than sufficient without being excessive.

PLENTIFUL implies a great or rich supply.

e.g. peaches are plentiful this summer

AMPLE implies a generous sufficiency to satisfy a particular requirement.

e.g. ample food to last the winter

ABUNDANT suggests an even greater or richer supply than does PLENTIFUL.

e.g. streams abundant with fish

COPIOUS stresses largeness of supply rather than fullness or richness.

e.g. copious examples of bureaucratic waste

existing or available in large quantities; plentiful:

｟かたく｠ 〈物などが〉豊富にある, 大量の (!plentifulより強意) ; 〖be ～ in ［with］ A〗 〈場所が〉A〈物など〉が豊富で, あり余って

e.g. there was abundant evidence to support the theory.

predicative (abundant in) having plenty of:

e.g. the riverbanks were abundant in wild plants.

late Middle English: from Latin abundant- ‘abounding’, from the verb abundare (see abound).