WordNet sense 1 (a period of indeterminate length (usually short) marked by some action or condition):

patch, spell, while

WordNet sense 2 (a share of something):

slice

WordNet sense 3 (a portion of a natural object):

part

WordNet sense 4 (an instance of some kind):

bit

WordNet sense 5 (a musical work that has been created):

composition, opus, musical composition, piece of music

WordNet sense 6 (a work of art of some artistic value):

objet d'art, art object

WordNet sense 7 (game equipment consisting of an object used in playing certain board games):

man

WordNet sense 8 (a portable gun):

firearm, small-arm

WordNet sense 9 (create by putting components or members together):

assemble, tack, set up, put together, tack together

WordNet sense 10 (eat intermittently; take small bites of):

nibble, pick