is a specific kind of: quantity.

is a broader term that covers: amplitude, bountifulness, bounty | plenitude, plenteousness, plentifulness, plentitude, plenty | cornucopia, profuseness, profusion, richness | wealth | lushness, luxuriance, voluptuousness | overabundance, overmuch, overmuchness, superabundance.

is the opposite of: scarceness, scarcity.

derivation: abound | abundant | ample, copious, plenteous, plentiful, rich | copious, voluminous | teeming.