Examples from the Web for post-hole
Make the holes for the posts with a post-hole auger, two feet deep; set in the posts, charred on one end, to make them durable.
One can rake over an acre more easily than dig one post-hole.Picture-Work|Walter L. (Walter Lowrie) Hervey
The dirt blew from a post-hole in the hillside and left the hole sticking out of the ground about two feet with no dirt around it.The Scrap Book, Volume 1, No. 4|Various