San·ga·mon River 
(sănggə-mən)
(sănggə-mən) A river, about 400 km (250 mi) long, of central Illinois flowing southwest and west to the Illinois River.
- semi-
- semiabstract
- semiabstraction
- semiannual
- semiannually
- semiaquatic
- Semi-Arian
- Semi-Arianism
- semiarid
- semiaridity
- semiattached
- semiauto
- semi-auto
- semiautobiographical
- semiautomated
- semiautomatic
- semi-automatic
- semiautonomous
- semiautonomously
- semiautonomy
- semibold
- semibreve
- semicentennial
- semicircle
- semicircular