costless Synonyms

free complimentary gratuitous gratis unsalaried unsolicited unrecompensed uncompensated free of expense untaxed rent-free pro bono on the cuff toll-free at no cost at no charge without recompense unpaid for on someone freely given as a perk as a gift for love no charge unasked-for freebie for the asking paper honorary given freewill expenseless eleemosynary donated courtesy charitable semidetached spontaneous free of charge compliments of the house Comp for nothing for free buckshee handout unpaid voluntary chargeless