up·sell·ing 
(ŭpsĕl′ĭng)
(ŭpsĕl′ĭng)n.
The practice of offering customers additional or more expensive products or services after they have already agreed to buy something.
upsell′ v.
- autogyro
- autoharp
- autohypnosis
- autohypnotic
- autoimmune
- autoimmunity
- autoimmunization
- autoinfection
- autoinoculable
- autoinoculation
- autointoxication
- autoloading
- autologous
- autologously
- autolysate
- autolysin
- autolysis
- autolytic
- autolyze
- automaker
- automat
- automata
- automatable
- automate
- automated teller machine