Merriam-Webster Online Dictionary
contribution (noun)1.
a payment (as a levy or tax) imposed by military, civil, or ecclesiastical authorities usually for a special or extraordinary purpose
2.
the act of - contributing , also the thing - contributed
Merriam-Webster Online Thesaurus
contribution (noun)a gift of money or its equivalent to a charity, humanitarian cause, or public institution
SYNONIMS:
alms, benefaction, beneficence, charity, donation, philanthropyRELATED WORDS:
offering, tithe; bequest, endowment, legacy; aid, assistance, dole, handout, relief, welfare; grant, subsidy; benevolence, bestowal, largesse ( largess), present, presentation