n. 25B6; noun
a lubrication system which reduces friction : ABRASION, rubbing, chafing, grating, rasping, scraping; resistance, drag.
there was considerable friction between father and son : DISCORD, strife, conflict, disagreement, dissension, dissent, opposition, contention, dispute, disputation, arguing, argument, quarrelling, bickering, squabbling, wrangling, fighting, feuding, rivalry; hostility, animosity, antipathy, enmity, antagonism, resentment, acrimony, bitterness, bad feeling, ill feeling, ill will, bad blood.
harmony.