· Oribi
oribi
Oryx.
oribi
Buffalo is not really an antelope, but it is the closest relative to the antelope where the name ends with an o.
Oman
Oyster
Over the rainbow
Ostrich
Ohio begins with the letter O. Oklahoma and Oregon begin with the letter O.
OcelotOctopusOkapi (antelope)OlingoOlmOnagerOpossumOrangutanOrcaOrioleOropendolaOropendulaOryxOspreyOstracodOstrichOtterOvenbirdOwlOxOxenOxpeckerOysterOzark big-eared bat
Georgia O'Keefe was an American artist. Her name begins with the letter O.
No, there is not a continent that begins with the letter O.