testis /tesˈtis/

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

• underinsures
• underinsuring
• underinvestment
• under-jaw
• underjawed
• under-jaws
• underkeep
• underkeeper
• underkeepers
• underkeeping
• underkeeps
• underkept
• underking
• underkingdom
• underkingdoms
• underkings
• underlaid
• underlain
• underlap
• underlapped
• underlapping
• underlaps
• underlay
• underlayer
• underlayers