潤滑油 （ジュンカツユ） lubricating oil, lubricant, lube, person or thing that makes things run smoothly, facilitator

潤色 （ジュンショク） rhetorical flourishes

豊潤 （ホウジュン） abundant, rich, ripe, mellow

芳醇 （ホウジュン） mellow (flavor or fragrance, esp. alcohol), rich, full-bodied, superior

潤う （うるおう） to be moist, to be damp, to get wet, to be watered, to profit by, to receive benefits, to receive favors (favours), to become rich, to become at ease financially

潤す （うるおす） to moisten, to wet, to profit, to enrich, to benefit

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