list of synonyms of word retrofit

• component (generic term)
• constituent (generic term)
• element (generic term)

• addition (generic term)

• supply (generic term)
• provide (generic term)
• render (generic term)
• furnish (generic term)

• install (generic term)
• instal (generic term)
• put in (generic term)
• set up (generic term)

• overhaul (generic term)
• modernize (generic term)
• modernise (generic term)