As nouns the difference between plentifulness and abundancy
is that plentifulness is a full supply; abundance; plenitude; plenty while abundancy is a state of plentifulness .
plentifulness
English
Noun
(-)
A full supply; abundance; plenitude; plenty.
Usage notes
In formal English, the term plenitude, or simply plenty is preferred.
abundancy
English
Noun
(abundancies)
A state of plentifulness.
References