1. The ordinal number of forty in counting order
   - fortieth

See also: ordinal

• Impressionism
• impressionist
• impressionistic
• impressive
• impressive aphasia
• impressively
• impressiveness
• impressment
• imprest
• imprimatur
• imprimis
• imprint
• imprinting
• imprison
• imprisoned
• imprisonment
• impro
• improbability
• improbable
• improbableness
• improbably
• improbity
• impromptu
• improper
• improper fraction