willy-willy/ʹwili wili/ noun (pl -ies) (pl willy-willies)

• spew
• SPF
• sp. gr.
• sphagnum
• sphalerite
• sphene
• sphenoid
• sphere
• -sphere
• spherical
• spherical aberration
• spherical angle
• spherical coordinate
• spheroid
• spherometer
• spherule
• spherulite
• sphincter
• sphinx
• sphygmograph
• sphygmomanometer
• spic
• spic-and-span
• spiccato
• spice