Synonyms and related words :
as a gift, as our guest, charitable, complimentary, costless, eleemosynary, expenseless, for free, for love, for nothing, for the asking, free, free as air, free for nothing, free gratis, free of charge, free of cost, freebie, giftlike, given, gratuitous, gratuitously, on one, on the house, to his heirs, unbought, unpaid-for, untaxed, without charge