on o - out
- on occasion
- on one hand
- on one side
- on only for a part
- on only two occasions
- on our behalf
- on our part
- on prescription
- on receipt
- on receipt of
- on request
- on round
- on site fuel storage
- on strike
- on the alert
- on the assumption
- on the average
- on the basis of
- on the contrary ,
- on the dodge
- on the fly
- on the following :
- on the grounds that
- on the left
- on the left and right
- on the left side of
- on the lookout
- on the lookout for
- on the one hand
- on the one part
- on the one side
- on the order
- on the other ,
- on the other hand
- on the other part
- on the other side
- on the outside
- on the part of
- on the point of
- on the right of
