List of to spare synonyms and to spare related words.
de trop, dispensable, excess, expendable, expletive, extra, fresh, gratuitous, held back, held in reserve, held out, in abeyance, in excess, in hand, left, leftover, mint, needless, net, new, nonessential, odd, original, outstanding, over, pleonastic, pristine, prolix, put aside, put by, redundant, remaining, remanent, reserve, saved, spare, stored, supererogatory, superfluous, surplus, surviving, suspended, tautologic, tautologous, unapplied, unbeaten, uncalled-for, unconsumed, unemployed, unessential, unexercised, unexpended, unhandled, unnecessary, unneeded, unspent, untapped, untouched, untrodden, unused, unutilized, verbose, waived