Plentiful, ample, rich, liberal, bountiful, huge, bumper, superabundant, inexhaustible, prolific, in plenty, a gogo, lank, plenteous, be plentiful, exist in abundance, be thick on the ground, be two/ten a penny, copious, profuse, lavish, generous, large, great, overflowing, infinite, opulent, teeming, in abundance, galore, bounteous, abound, be numerous, proliferate, and grow on trees.