Synonyms for Rub (same or very similar meaning)
WordNet sense 1 (an unforeseen obstacle):
hitch, snag, hang-upWordNet sense 2 (scrape or rub as if to relieve itching):
itch, scratchWordNet sense 3 (cause friction):
chafe, fray, fretWordNet sense 4 (the act of rubbing or wiping):
wipeFrom the ODE community, based on WordNetadd/edit