parathesis /pə-rathˈi-sis/

1. Apposition (grammar)
2. The compounding of words without change, as (Latin) rēspūblica from rēs and pūblica (philology)

• unpensioned
• unpent
• unpeople
• unpeopled
• unpeoples
• unpeopling
• unpeppered
• unperceivable
• unperceivably
• unperceived
• unperceivedly
• unperceptive
• unperch
• unperched
• unperches
• unperching
• unperfect
• unperfected
• unperfection
• unperfections
• unperfectly
• unperfectness
• unperfectnesses
• unperforated
• unperformed