upcushion
/ˌʌpˈʃuʃən/Definitions
1. verb
to add or replace the cushion or upholstery of a piece of furniture
“The interior designer chose to upcushion the old sofa to give it a fresh new look.”
2. noun
the act of adding or replacing the cushion or upholstery of a piece of furniture
“The process of upcushioning the chairs took several hours to complete.”