Crutch

Noun

 * 1) A device to assist in motion as a cane, especially one that provides support under the arm to reduce weight on a leg.
 * He walked on crutches for a month until the cast was removed from his leg.
 * 1) Something that supports, often used negatively to indicate that it is not needed and causes an unhealthful dependency; a prop
 * Alcohol became a crutch to help him through the long nights; eventually it killed him.

Thesaurus
Malacca cane, V, advocate, alpenstock, arm, athletic supporter, back, backbone, backing, bandeau, baton, bearer, bra, brace, bracer, bracket, branch, brassiere, buttress, cane, carrier, cervix, corset, crook, crosier, cross, cross-staff, crotch, crutch-stick, delta, fan, fork, foundation garment, fulcrum, furcula, furculum, girdle, groin, guy, guywire, handstaff, inguen, jock, jockstrap, lituus, mainstay, maintainer, mast, neck, offshoot, pastoral staff, paterissa, prong, prop, quarterstaff, ramification, reinforce, reinforcement, reinforcer, rest, resting place, rigging, shillelagh, shoulder, shroud, spine, sprit, staff, standing rigging, stave, stay, stem, stick, stiffener, strengthener, support, supporter, sustainer, swagger stick, swanking stick, trident, upholder, walking stick, wishbone