- Any of several grasses of the genusAlopecurus, having dense, silky or bristly flowering spikes. 狐尾草：看麦娘属 草的一种，有浓密的，光滑或多硬毛的花穗
- systoles
- systolic pressure
- Syzran
- syzygies
- syzygy
- syū-
- sz
- Szczecin
- Szechuan
- Szechuan pepper
- Szechwan
- Szeged
- Szell
- Szent-Györgyi
- Szigeti
- Szilard
- Colorado Christian University
- Colorado College
- Colorado Desert
- Colorado Institute of Art
- Colorado Mountain College-Spring Valley Campus
- Colorado Mountain College-Timberline Campus
- Colorado Northwestern Community College
- Colorado potato beetle
- Colorado River