List of supererogatory synonyms and supererogatory related words.
de trop, dispensable, excess, expendable, expletive, gratuitous, in excess, needless, nonessential, pleonastic, prolix, redundant, spare, superfluous, supernumerary, tautologic, tautologous, to spare, unasked, uncalled-for, unessential, unnecessary, unneeded, verbose, wanton