Porkkala Peninsula
geographical name
Pork·ka·la Peninsula ˈpȯr-kä-ˌlä 
peninsula extending into the Gulf of Finland in southern Finland west of Helsinki
- on deck
- on defense
- on delivery
- on demand
- on deposit
- on display
- on draft
- on draught
- on drugs
- on drums
- on duty
- on earth
- on easy street
- on edge
- on end
- on equal terms
- on even keel
- on every hand
- on everybody's lips
- on everyone's lips
- on everyone's/everybody's lips
- on exhibit
- on exhibition
- on faith
- on false pretenses