spring·head 
(sprĭnghĕd′)
(sprĭnghĕd′)n.
A fountainhead; a source: a society that was the springhead of Western legal thought.
- sycamore
- syce
- sycee
- syconium
- sycophancy
- sycophant
- sycophantic
- sycophantical
- sycophantically
- sycosis
- Sydenham
- compound
- compoundable
- compound-complex sentence
- compounder
- compound eye
- compound fraction
- compound fracture
- compound gland
- compounding pharmacy
- compound interest
- compound leaf
- compound lens
- compound machine
- compound microscope