Or search: os, bone, cranium, braincase
1 Syllable: S
terre
2 Syllables: SU
area, Clara, era, Hara, Kara, para, Sara, Sarah, Vera, verba
3 Syllables: USU
Bavaria, Bulgaria, chimera, hysteria, malaria, Sahara, Sierra
4 Syllables: UUSU
Riviera

Found 19 words across 4 groupings.