Abundant

1. Fully sufficient; found in copious supply; in great quantity; overflowing. [First attested around 1350 to 1470.]^[3]

Antonyms: rare, scarce

2. Richly supplied; wealthy; possessing in great quantity. [First attested around 1350 to 1470.]^[3]
3. (mathematics) Being an abundant number, i.e. less than the sum of all of its divisors except itself. [First attested in the mid 16^th century.]^[3]Antonym: deficient

Usage notes

• (richly supplied): Normally followed by the word in or (obsolete) of.

Synonyms

• ample (see here for explanation of distinctions)
• bountiful
• copious
• exuberant
• liberal
• overflowing
• plenteous
• plentiful
• profuse
• rich
• teeming