Cow·litz River 
(koulĭts)
(koulĭts) A river rising in the Cascade Range of southwest Washington and flowing about 210 km (130 mi) west and south to the Columbia River.
- ont-
- on tap
- on target
- Ontario
- Ontario
- on tenterhooks
- on the alert
- on the back burner
- on the ball
- on the barrel
- on the barrel/barrelhead
- on the barrelhead
- on the beam
- on the blink
- on the brain
- on the breadline
- on the bubble
- on the bum
- on the button
- on the carpet
- on the cheap
- on the coattails of
- on the contrary
- on the cuff
- on the cusp