Synonyms of unpaid

1 Syllable
freest, owed, freer, due
2 Syllables
payable
3 Syllables
volunteer, free-willed, freewilled, delinquent, donated, gratuitous, unforced, overdue
4 Syllables
uncompelled, unrewarded, unsalaried, unprescribed, honorary, voluntary, contributed, receivable
5 Syllables
unindemnified