• sphnix,
• sphins,
• sphinnx,
• Sphinex,
• sphynks,
• sphinkx,
• sphyncx

• spheroid,
• spheric,
• spherule,
• spherier,
• sphagnum,
• Sphering,
• spheres,
• Spheral,
• sphericity,
• sphinx,
• Sphygmus,
• spheriest,
• sphinges,
• sphinxes,
• Spherics.

The adjective form of the word "sphynx" is "Sphynxian".

The plural form of the word "sphynx" is "sphinxes"

The singular form of the word "sphynx" is "sphynx".