Lamar's rhymes with:
amar's, amar's, marrs, mars, mars', marz, myanmar's, amar's, ares, azhar's, baars, babar's, bar's, barr's, barres, barrs, bars, barz, bazaars, car's, carr's, cars, cars', cigars, czar's, czars, dzhokhar's, far's, gars, guitars, hekmatyar's, jabar's, jars, kahr's, kahrs, lars, marrs, mars, mars', marz, minicars, myanmar's, nars, npr's, par's, pars, r's, r.'s, r.s, renoirs, sars, scars, shahar's, sitars, staar's, star's, starr's, starrs, stars, stars', superstars, tokars, vars
Lamar's sounds like:
lamarca, lamarche, lamers, lammers, lamoreaux, lamoreux, lamoureaux, lamoureux, lanners, lawnmowers, leaners, lemurs, lenarz, lillehamer's, lillehammer's, limerick, limerick's, limericks, linares, linear's, liner's, liners, liners', linhares, loners, lonrho's, luminaries