principal Antonyms

petit superaddition superfluous supernumerary supervenient supplanter supplemental supplementary trifling trivial underling unessential vicegerent waterman substituent subsidiary subordinate petty pickthank poor residuary salutatorian second secondary second-class second-rate side slight small subalternate worker worst footling underdog low-grade meter maid undistinguished fence-sitter small-time nurtural part-time penlight second gear second string spare part bottommost bush league pinch hitter unimportant unnecessary