edge

[1]	inch , move , sidle , crawl , creep , steal , worm , work (one's way)
[2]	inch
[3]	border
[4]	border , adjoin , abut , march , butt , butt against , butt on

[1]	brink , border , verge , border , side , rim , lip , brim , fringe , margin , boundary , bound , limit , bourn , perimeter , periphery
[2]	acuteness , boundary , bound , sharpness , keenness
[3]	harshness , sharpness , acrimony , pungency , force , urgency , effectiveness , incisiveness , causticity , virulence , vehemence
[4]	advantage , sharpness , head start , superiority , lead , upper hand
[5]	on edge , on tenterhooks , nervous , touchy , sensitive , prickly , itchy , tense , irascible , crabbed , irritable , peevish , apprehensive , with one's heart in one's mouth , edgy , anxious , ill at ease , restive , restless , fidgety , (Colloq) uptight , like a cat on a hot tin roof