grimace /grimˈəs or gri-māsˈ/

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

To make grimaces

grimˈacer noun

• subtractor
• subtractors
• subtracts
• subtrahend
• subtrahends
• subtreasurer
• subtreasurers
• subtreasuries
• Sunday drivers
• Sunday-go-to-meeting
• Sunday painters
• Sunday punch
• Sunday punches
• Sundays
• Sunday saint
• Sunday school
• Sunday schools
• sun deck
• sundeck
• sun decks
• sundecks
• sunder
• sunderance
• sunderances
• sundered