1) Canopy support 2) Canopy supporter 3) It helps support a canopy 4) Pole near a mattress 5) Spot for a nightcap 6) Support 7) Support for a sleeping area 8) Supporter of a canopy 9) Upright support 
• (n.) Anciently, a post or pin on each side of the bed to keep the clothes from falling off. See Bedstaff. • (n.) One of the four standards that support a bedstead or the canopy over a bedstead.
Bed'post` noun 1. One of the four standards that support a bedstead or the canopy over a bedstead. 2. Anciently, a post or pin on each side of the bed to keep the clothes from falling off. See Bedstaff . Brewer. 
[n] - any of 4 vertical supports at the corners of a bedstead
noun any of 4 vertical supports at the corners of a bedstead
one of the upright supports of a bedstead. · a split in which the seven and ten pins remain standing.