Or search: beast, brute, fauna, flora, adorned, crested, creature, decorated, ungregarious
2 Syllables: SU
budget, buffet, covet, dusted, musket, russet, rusted, rustic, suffix, Suffolk, Sussex, trusted
2 Syllables: US
beloved
3 Syllables: USU
adjusted, disgusted, distrusted, encrusted, entrusted, intrusted, mistrusted

Found 20 words across 3 groupings. Skipped 3 excess words of a similar stem.