Definition of abundant:

present in great quantity

Synonyms of abundant:

plentiful, copious, ample, firm, sound, strong, rich, stable, bountiful, plenteous

Opposite/Antonyms of abundant:

scarce, rare, insufficient, lacking, empty, little, niggardly, short, sparse

Sentence/Example of abundant:

The area has an abundant supply of rivers, varying in size, but none of them small!