smoother

a power tool used for sanding wood; an endless loop of sandpaper is moved at high speed by an electric motor
having a surface free from roughness or bumps or ridges or irregularities;
smoothly agreeable and courteous with a degree of sophistication;
of the margin of a leaf shape; not broken up into teeth
smooth and unconstrained in movement;
(music) without breaks between notes; smooth and connected;
of motion that runs or flows or proceeds without jolts or turbulence;
lacking obstructions or difficulties;
(of a body of water) free from disturbance by heavy waves;
SMOOTHER n pl. -S one that smooths

smoother is a valid Scrabble (US) TWL word

smoother is a valid Scrabble Word in Merriam-Webster MW Dictionary

smoother is a valid Scrabble Word in International Collins CSW Dictionary

smoother is a valid Words With Friends word