Synonyms for Allayment:

n.

pacification (noun)
armistice, stabilization, appeasement, placation, mollification, pacification, conciliation, reconciliation, moderation.
relief (noun)
mollification, satisfaction, appeasement.
satisfaction (noun)
gratification, satiation, fullness, engorgement, satisfaction.

Other synonyms:

Other relevant words:
appeasement.