periostracum /per-i-osˈtrə-kəm/

The horny outer layer of a mollusc's shell

• ungodlike
• ungodlily
• ungodliness
• ungodlinesses
• ungodly
• ungods
• ungord
• ungored
• ungorg'd
• ungorged
• ungot
• ungotten
• ungovernable
• ungovernableness
• ungovernably
• ungoverned
• ungown
• ungowned
• ungowning
• ungowns
• ungraced
• ungraceful
• ungracefully
• ungracefulness
• ungracefulnesses