grimace /grimˈəs or gri-māsˈ/

1. A distortion of the face, in fun, disgust, etc
2. A smirk

To make grimaces

• in good nick
• extensionally
• extensionist
• extensionists
• extension lead
• extension leads
• extensions
• extension tube
• extension tubes
• extensities
• extensity
• extensive
• extensively
• extensiveness
• extensivenesses
• extensivisation
• extensivization
• extensometer
• extensometers
• extensor
• extensors
• extent
• extents
• extenuate
• extenuated