Or search: yottabyte, zettabyte
2 Syllables: SU
beehive, Eli, Ely, Levi, meantime, Meanwhile, peacetime, realise, realize, rewrite, seaside, senile, streamlined
3 Syllables: UUS
idealized

Found 14 words across 2 groupings. Skipped 2 excess words of a similar stem.