Arches rhymes with:
blowtorches, porches, agache's, agaches, aldrich's, approaches, backstitches, batches, beach's, beaches, blotches, blowtorches, branches, britches, bunches, catches, church's, churches, clenches, clinches, clutches, ditches, drenches, gerchas, impeaches, inches, inches', itches, latches, launches, matches, matsch's, mevarach's, mevarachs, nevarach's, notches, patches, peaches, porches, pouches, quenches, ranches, reaches, riches, scratches, sketches, speeches, stretches, swatches, switches, teaches, touches, watches, witches
Arches sounds like:
air's, airco, aircoa, aires, airgas, airs, airway's, airways, airways', airways's, araiza, arakaki, arakawa, araki, araskog, araujo, arc, arce, arceo, arch, archaic, archey, archie, archway, arco, arco's, arcos, arcs, area's, areas, arechiga, ares, argo, argo's, argosy, argue, argues, arguijo, argus, arias, arias's, aric, arico, aries, aris, arise, arises, ariza, arjo, ark, arko, arkose, arocha, arocho, aros, arose, arouse, arouses, arrays, arrearage, arrearages, arrears, arriaga, arrick, arrigo, arris, arrow's, arrows, arroyo's, arx, aurich, ayars, ayer's, ayers, ayres