Syzygy

Syzygy, the point on the orbit of a planet, or the moon when it is in conjunction with, or in opposition to, the sun.

Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)

Système de la Nature * Szechuan
Synod
Synoptic Gospels
Syra
Syracuse
Syria
Syrianus
Syrinx
Syrtis, Major and Minor
Syrus, Publius
Système de la Nature
Syzygy
Szechuan
Szegedin
Tabard
Tabernacle
Table Mountain
Tables, The Twelve
Tablets
Table-turning
Taboo
Tabor, Mount