Or search: aizoaceae, tetragoniaceae
2 Syllables: SU
conference
3 Syllables: SUU
complement, confident, Congressman, consequence, consequent, consonance, consonant, continence, continent, dominance, dominant, monument, prominence, prominent
4 Syllables: USUU
incompetence, incompetent, incontinence, predominance, predominant, preponderant

Found 21 words across 3 groupings. Skipped 4 excess words of a similar stem.