Thomasine rhymes with:
tomasine, tomasini, masini, tomasine, tomasini, masini, tomasine, tomasini, alfonsine, ambrosine, ambrosini, blasini, cassini, corsini, deconcini, frazzini, masini, mosinee, orsini, procassini, rosine, rossini, tomasine, tomasini, ursini, vizzini
Thomasine sounds like:
tangeman, tangen, tangney, tanguma, tankan, tanzania, tanzanian, temkin, teng-wen, tennessean, tennison, tennyson, tension, thinkin, thinkin', thomasina, thomason, thomassen, thomasson, thomison, thomsen, thomson, tianjin, timken, timson, tingen, tinkham, tinsman, tomasina, tomasine, tomasini, tomasino, tomkin, tomson, tonkin, tonnesen, townsman, townson, tunisian, tunison, twonshein