on a par (adjective) comparable: worthy of comparison
Detalii: when a comparison is of such a nature that it comprises three terms, then comparable is the word to use; when it comprises four terms, the relation requires the word analogous
Sinonime: contributed, donated, due, freewilled, gratuitous, honorary, uncompensated, unindemnified, unrecompensed, unrewarded, unsalaried, voluntary, volunteer
Antonime: incomparable,
unequal,
unworthy