Or search: dissolution, liquefaction
2 Syllables: SU
bawling, brawling, calling, calming, Collins, crawling, falling, galling, halting, hauling, lolling, scalding, solving, sprawling, vaulting
3 Syllables: USU
appalling, assaulting, evolving, exalting, installing, involving, recalling, resolving, revolving

Found 24 words across 2 groupings. Skipped 1 excess word of a similar stem.