testis /tesˈtis/

1. (a more formal word for) a testicle
2. A rounded body like it

• double-storey
• double-stout
• doublet
• double take
• double takes
• double-talk
• doublethink
• doublethinks
• double-threaded screw
• double-threaded screws
• double time
• doubleton
• double-tongue
• double-tongued
• double-tongues
• double-tonguing
• doubletons
• double top
• doubletree
• doubletrees
• doublets
• double-u
• double up
• double vision
• double wedding