parathesis /pə-rathˈi-sis/

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

• grass widows
• grasswrack
• grasswracks
• grassy
• graste
• grat
• grate
• grated
• grateful
• gratefully
• gratefulness
• gratefulnesses
• grater
• graters
• grates
• graticulation
• graticulations
• graticule
• graticules
• gratification
• gratifications
• gratified
• gratifier
• gratifiers
• gratifies