Synonyms of excessive

1 Syllable
stiff, steep, great, more
2 Syllables
undue, pricey, breakneck, two-ton, dizzying, bumper, heaviest, greatest, lavish, costlier, glaring, needless, extra, boundless, vaulting, costliest, deadwood, costly, heavier, pricier, super, heavy, over, rampant, sky-high, firstclass
3 Syllables
extreme, overkill, enormous, onerous, overmuch, heavyweight, redundant, causeless, superfluent, high-ranking, indulgent, overgrown, prodigals, overboard, limitless, terrific, superfluous, luxuriant, big-ticket, towering, plentiful, prodigal, plethoric, unbounded, exalted, intense
4 Syllables
nonessential, preposterous, self-indulgent, stratospheric, extravagant, overtaxing, profusive, dissipated, dispensable, residuary, highest-ranking, proscriptive, unexcelled, unreasoned, all-consuming, fructiferous, profligate, exorbitant, expensive, sensational
5 Syllables
unreasonable, unconscionable, unmeasurable, recrementitious, inordinate, super-colossal, intemperate, superabundant, prohibitive, immoderate, supernatural, semitropical, exaggerated, superlative
6 Syllables
sensationalistic, disproportionate
7 Syllables
supererogatory