Sidelines rhymes with:
guidelines, bloodlines, deadlines, guidelines, headlines, strandlines, airline's, airlines, airlines', baselines, bloodlines, caroline's, coastlines, dateline's, datelines, deadlines, enterline's, esterline's, felines, frontline's, guidelines, headlines, hemlines, hotlines, lifelines, moneyline's, nightline's, nightlines, online's, outlines, pipeline's, pipelines, pipelines', skylines, smithkline's, storylines, strandlines, underlines, villines
Sidelines sounds like:
saddling, scheduling, scuttling, seedling, seedlings, settling, shuttling, sidling, sotolongo, stalin's, stalinize, stalling, stallings, stallions, stallone's, stealing, stehling, stelling, stellmach, stelmach, stelmack, stillings, stillness, stollings, styling