Nouns

(n)hang-up, hitch, rub, snagan unforeseen obstacle
(n)rub, wipethe act of rubbing or wiping“he gave the hood a quick rub”

Verbs

(v)rubmove over something with pressure“rub my hands”, “rub oil into her skin”
(v)rub, fray, fret, chafe, scratchcause friction“my sweater scratches”
(v)rub, scratch, itchscrape or rub as if to relieve itching“Don't scratch your insect bites!”