Or search: link, nexus, genetics, connexion, fastening, attachment, inheritance
2 Syllables: SU
bringeth, dimness, England's, English, finis, finish, Finnish, fringes, glimpses, grimace, hinges, image, inches, incomes, Indians, India's, Indus, interests, kingdoms, Lincoln's, lineage, linguist, minions, pinions, pinkish, Plymouth, princes, shrinkage, simplest, sinless, sinuous, spinach, symptoms, thinness, thinnest, vintage
3 Syllables: USU
convinces, Corinthians, diminish, distinctions, distinctive, distinctness, distinguish, dominions, evinces, extinguish, incentives, instinctive, Olympus, opinions, relinquish, unfinished
4 Syllables: UUSU
ignominious, undiminished, undistinguished

Found 55 words across 3 groupings. Skipped 7 excess words of a similar stem.