So-lic-i-ta-tion, taerddeisyfiad
Sti-pen-di-a-ry, cyflogddyn
Sub-or-di-na-tion, israddoliaeth
Sub-sid-i-a-ry, cynnorthwyol
Sub-ter-ra-ne-ous, tanddaiarawl
Su-per-a-bun-dance, arddigonedd, gormodedd
Su-per-a-bun-dant, gormodawl
Su-per-an-nu-ate, oedfreinio; gorflwyddiant
Su-per-flu-i-ty, gorddigonedd
Su-per-in-tend-ence, arolygiad, golygiad