1. Oxide of silicon; a substance which enters into the composition of most earthy minerals, and forms some of the mountainous masses of the globe's surface, rock crystal, flint and other varieties of quartz being nearly pure silica.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• celica,
• polica,
• sotica,
• sililar,
• slicy,
• alica,
• sinic,
• siliva,
• solict,
• silimar,
• silicn,
• solic,
• silece,
• silcia,
• silca,
• silce,
• siliocan,
• felica,
• siliar,
• silicas

• siliqua,
• sialis,
• sillago,
• Silas,
• sills.

The adjective form of the word "silica" would be "siliceous".

The plural of the "silica" can be the "silicas".

The singular of the "silica" can be the "silica".