| localise | |
| lock | |
| lock with pen | |
| locomotive | |
| locomotive driver | |
| locomotive inspector | |
| locomotive running shed | |
| locomotive shed | |
| locomotive shed master | |
| lodging turn | |
| log | |
| lollipop | |
| London end | |
| long shed | |
| loo | |
| look | |
| loose shunting | |
| lorry | |
| lorry driver | |
| lose one’s colour | |
| loudly crying face | |
| loudspeaker | |
| love | |
| love hotel | |
| love letter | |
| lucerne | |
| lucky beggar | |
| luffing crane | |
| luggage trolley | |
| luggage van | |
| lustre | |
| lustre terminal | |
| mack | |
| magnetisation | |
| mahjong red dragon | |
| maid of honour | |
| maille | |
| mail sorting van | |
| main beam | |
| main signal box | |
| main train | |
| maize | |
| maize cob | |
| maize silk | |
| maize stigma | |
| make grey | |
| man and woman holding hands | |
| man in business suit levitating | |
| manoeuvrability | |
| manoeuvrable | |
| British English |