Or search: blown, pursy, winded, exciting, dyspneal, dyspneic, inanimate, dyspnoeic, pulseless, smothering, suffocating, asphyxiating, unventilated
2 Syllables: SU
crevice, deafness, dresses, edges, envious, freshest, freshness, heaviest, leverage, message, precious, PREFACE, presses, restless, sketches, stresses, stretches, trespass, wedges
3 Syllables: SUU
compresses, progresses
3 Syllables: USU
asbestos, depresses, expresses, impetuous, incestuous, possesses, successes

Found 28 words across 3 groupings. Skipped 1 excess word of a similar stem.