Panels' rhymes with:
panel's, panels, annals, canales, channel's, channels, dannels, flannels, panel's, panels, transchannel's
Panels' sounds like:
painless, pamela's, panel's, panelize, panels, pannill's, penalize, penalizes, penaloza, penelas, penn-hills, penniless, penology, phenolic, phonology, pinellas, pinholes, pomology