Best birthday gift with O
- orange
 - octopus
 - Oven
 - Opal
 - Opals
 - Owl
 - olives
 - Ornament
 - Opera tickets
 - Opal earrings
 - orange juice
 - Ornaments
 - oil
 - Otter
 - organ
 - Oculus
 - Opal ring
 - opal necklace
 - Orangutan
 - Origami
 - olive
 - Onion
 - orgy
 - Onesie
 - Oboe
 - Overalls
 - outfit
 - Orange car
 - Ottoman
 - Oscar
 - Oreo
 - Ocean
 - Orchid
 - opera
 - oats
 - Oysters
 - Oro
 - Onyx
 - Orchids
 - orange shirt
 - Orange chocolate
 - Opera ticket
 - onion rings
 - Omega watch
 - Oxygen
 - Onions
 - oyster
 - Opium
 - Octopus stuffed animal
 - Ocarina
 - orange cake
 - oven mitts
 - Otters
 - Oreo cake
 - Orange Lamborghini
 - Open bar
 - Opel
 - outfits
 - Organs
 - Oreo cookies
 - ore
 - old
 - Olaf
 - Octopus plush
 - Ovaries
 - Organizer
 - Orange socks
 - Orange ball
 - Orange bag
 - Opening gifts
 - One hundred dollars
 - Omelette
 - Oldsmobile
 - Ointment
 - Oils
 - Octopus toy
 - Ocean Cruise
 - overseas trip
 - Outing
 - orphan
 - orange soda
 - One Million Dollars
 - Omega
 - Olympic tickets
 - Olive tree
 - old socks
 - oil diffuser
 - office desk
 - Octopus pet
 - obstacle course
 
Slová v zozname Best birthday gift with O pochádzajú od hráčov slovnej hry Meno, Mesto, Zviera, Vec.