Home › Words › S › sideachesideachesideache means A pain in one's side.EtymologyFrom side + ache.nounA pain in one's side.Definitions & examples from Wiktionary (CC BY-SA 3.0).Words closest in meaningBy meaning, not spelling — each word's AI semantic fingerprint, nearest first.arseache 66% match — Synonym of assache (“pain in the ass”). vs sideache →waistache 64% match — Pain in the waist; backache of the lower back. vs sideache →backaching 63% match — Causing a pain in one's back. vs sideache →neckache 62% match — A pain in the area of the neck. vs sideache →aching 62% match — That aches; continuously painful; that causes pain. vs sideache →backache 61% match — Any pain or ache in the back. vs sideache →assache 61% match — Synonym of pain in the ass. vs sideache →boneache 61% match — Pain in the bones, or seemingly in the bones. vs sideache →