Feldspars rhymes with:
aerostar's, aerostars, avatars, boxcars, cojimar's, escobar's, gaidar's, handlebars, hectares, jaguar's, jaguars, magyars, melkar's, memoirs, minstar's, mizar's, morningstar's, motorcars, northstar's, radars, railcars, registrars, reservoirs, seminars, seskar's, sidebars, tigar's, windstar's