潤滑油【じゅんかつゆ】
lubricating oil, lubricant, lube, person or thing that makes things run smoothly, facilitator
潤い【うるおい】
moisture, damp, wetness, richness, warmth, interest, taste, charm, financial leeway, gains, profit, blessing, grace, favour, favor
利潤【りじゅん】
profit, returns
潤む【うるむ】
to be wet, to be moist, to get dim, to become blurred, to get cloudy, to get muddy, to be bleared, to become tear-choked
潤う【うるおう】
to become moist, to be moistened, to become damp, to get wet, to profit (from), to benefit, to become prosperous, to flourish, to be made rich, to be refreshed (of one's mind), to be enriched (of one's heart)
潤す【うるおす】
to moisten, to wet, to profit, to enrich, to benefit