Or search: hormone, pressor, epinephrin, epinephrine, vasoconstrictor, vasoconstrictive
2 Syllables: SU
deadening, deafening, leveling, meddling, reckoning, settling, threatening, trembling, wrestling
3 Syllables: SUU
beckoning, bettering, editing, entering, Evelyn, festering, gentlemen, lessening, lettering, levelling, measuring, menacing, reddening, revelling, severing, threatenings, trespassing, weathering
3 Syllables: USU
assembling, endeavoring, resembling, unsettling
4 Syllables: USUU
developing, discrediting, embarrassing, endeavouring, enveloping, inheriting

Found 37 words across 4 groupings.