N  adjunct, addition, additament, additum, affix, appelidage, annexe, annex, augment, augmentation, increment, reinforcement, supernumerary, accessory, item, garnish, sauce, accompaniment, adjective, addendum, complement, supplement, continuation, rider, offshoot, episode, side issue, corollary, piece, flap, lappet, skirt, embroidery, trappings, cortege, tail, suffix, wing, additional, alate, alated, winged, in addition.

at issue, blind side, bond issue, bright side, credit side, crown side, debit side, distaff side, east side, flip side, government issue, hot issue, issue, issue forth, issue price, lee side, leeward side, military issue, north side, on the far side, on the side, other side, rights issue, side, side arm, side by side, side chair, side chapel, side dish, side door, side drum, side effect, side entrance, side horse, side judge, side line, side of bacon, side of beef, side of meat, side of pork, side pocket, side road, side slip, side street, side view, side with, side yard, south side, spear side, spindle side, stock issue, sword side, take issue, take issue with, top side, upper side, weather side, west side, windward side