Or search: asia, craton, pangea, eurasia, pangaea, landmass, mainland, laurasia, australia
2 Syllables: SU
conference
3 Syllables: SUU
complement, confident, Congressman, consequence, consequent, consonance, consonant, continence, continents, dominance, dominant, monument, prominence, prominent
4 Syllables: USUU
incompetence, incompetent, incontinence, predominance, predominant, preponderant

Found 21 words across 3 groupings. Skipped 3 excess words of a similar stem.