Or search: mane, foretop, forelock
2 Syllables: SU
color, colour, culture, duller, earlier, lovelier, Muller, sculptor, sculpture, sulfur, sulphur, ulcer, Ulster, vulgar, vulture
3 Syllables: USU
discolored, discoloured

Found 17 words across 2 groupings. Skipped 11 excess words of a similar stem.