courser
Concise Oxford English Dictionary © 2008 Oxford University Press:
courser1
▶noun literary a swift horse.
Concise Oxford English Dictionary © 2008 Oxford University Press:
courser2
▶noun a fast-running plover-like bird found in open country in Africa and Asia. [Cursorius cursor (cream-coloured courser) and other species.]
– origin C18: from mod. L. Cursorius ‘adapted for running’, from L. cursor ‘runner’.
Concise Oxford English Dictionary © 2008 Oxford University Press:
courser3
▶noun a person who goes coursing with greyhounds.
'courser' also found in these Oxford entries:

