1. Very good
   - bang-up, bully, corking, cracking, dandy, great, groovy, keen, neat, nifty, peachy, slap-up, swell, smashing, grouse [Austral, NZ], ripper [Austral]

See also: good

• orator
• oratorical
• oratorio
• oratory
• oratrix
• orb
• orb web
• orb-weaver
• orb-weaving
• orb-weaving spider
• orbicular
• orbiculate
• orbiculate leaf
• Orbignya
• Orbignya cohune
• Orbignya martiana
• Orbignya phalerata
• Orbignya spesiosa
• Orbison
• orbit
• orbit period
• orbital
• orbital cavity
• orbital motion
• orbital plane