The traditional spelling is d-o-u-g-h-n-u-t but people often just spell it d-o-n-u-t.

VOA: special.2010.04.12

"But there were a couple "trouble songs" that just weren't working. They were o.k., but I wanted something different.

VOA: standard.2009.04.21

"Just to see how many people were walking around singing 'O Canada!' in the streets with flags waving.

VOA: standard.2010.02.28

Stupid is as stupid does, sir. That's what's leftafter me saying, "When I was in China onthe all-America Ping-Pong team, "I just lovedplaying Ping-Pong with my Flex-O-LitePing-Pong paddle,"

VOA: standard.other

You just run, O. K?Just run away.

VOA: standard.other