• apherules,
• zpherules,
• xpherules,
• dpherules,
• epherules,
• wpherules,
• soherules,
• slherules,
• s-herules,
• s0herules,
• spgerules,
• spberules,
• spnerules,
• spjerules,
• sperules,
• spheruels,
• spharules,
• sphirules,
• sferules,
• sphyrules

• spirula,
• sporulate,
• sproule,
• sproles,
• sphaeralcea,
• sphaeriales,
• Spruell,
• spherule,
• sproul,
• Spruill.

The adjective form of the word "spherules" is "spherular".