1. Not extensile
   - inextensible, nonprotractile

Antonym: extensile

• headcount
• headcounter
• headdress
• headed
• header
• headfast
• headfirst
• headfish
• headful
• headgear
• headhunt
• headhunter
• headily
• headiness
• heading
• headlamp
• headland
• headless
• headlight
• headlike
• headline
• headliner
• headlinese
• headlock
• headlong