Synonyms for Accrual:

adj.

additional (adjective)
expanded, amalgamated, raised, Annexed, incremented, additional, augmented, increased, enlarged, larger, grown, more, extended.

n.

spurt, upsurge, jump, leap, surge, upswing, explosion. accrual (noun)
accruement, accumulation.
act (noun)
accruement, accumulation.
addition (noun)
augmentation, attainment, accumulation, acquisition, increment, addition, aggregation, expansion, increase, enlargement.
growth (noun)
accumulation, increase.
increase (noun)
multiplication, magnification, elevation, extension, growth, inflation.

Other synonyms:

Other relevant words:
spurt, jump, upswing, accruement, surge, explosion, leap, upsurge.