On Halloween, you can find candy in abundant supply. Use abundant to describe something that exists in large amounts that are more than what's needed.
Near synonyms are plentiful, emphasizing "large amounts," and ample, emphasizing "more than enough." The adjective abundant is commonly followed by the prepositions with or in, to mean "filled with or rich in something": a region abundant in natural resources. Abundant comes from Middle English aboundant, from Old French abondant, from Latin abundāns, form of abundāre "to overflow."