Or search: usa, waco, u.s., bryan, dixie, plano, tyler, pecos, austin, brazos, dallas, laredo, lufkin, odessa, sabine
2 Syllables: SU
breakfast, deadliest, dexterous, exits, extras, headless, lettuce, necklace, nexus, plexus, readiest, reckless, redness, sexes, wreckage
3 Syllables: USU
correctness, directness, infectious, prospectus

Found 19 words across 2 groupings. Skipped 1 excess word of a similar stem.