17 possible answers to
Answers with 3 characters: ODD Answers with 4 characters: MORE OVER PERK PLUS Answers with 5 characters: ADDED ADDON BONUS SPARE Answers with 6 characters: ADDD-2 Answers with 7 characters: ADDEDIN ADDEDON AMENITY OVERAGE SURPLUS TOSPARE Answers with 9 characters: SPILLOVER