WordNet sense 1 (assets belonging to or due to or contributed by an individual person or group):

part, percentage, portion

WordNet sense 2 (a sharp steel wedge that cuts loose the top layer of soil):

plowshare, ploughshare

WordNet sense 3 (have, give, or receive a share of):

partake, partake in

WordNet sense 4 (give out as one's portion or share):

apportion, deal, divvy up, portion out

WordNet sense 5 (the allotment of some amount by dividing something):

parcel

WordNet sense 6 (any one of a number of individual efforts in a common endeavor):

contribution