parathesis /pə-rathˈi-sis/

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

• unbonnets
• unbooked
• unbookish
• unboot
• unbooted
• unbooting
• unboots
• unbore
• unborn
• unborne
• unborrowed
• unbosom
• unbosomed
• unbosomer
• unbosomers
• unbosoming
• unbosoms
• unbottomed
• unbought
• unbound
• unbounded
• unboundedly
• unboundedness
• unboundednesses
• unbowed