Painless rhymes with:
stainless, boneless, directionless, frictionless, hornless, mccanless, motionless, skinless, spineless, stainless, wanless
Painless sounds like:
pamela's, panel's, panelize, panels, panels', pannill's, penalize, penalizes, penaloza, penelas, penn-hills, penniless, penology, phenolic, phonology, pinellas, pinholes, pomology