M18
- Bauhaus University, Weimar
- Haplogroup M18
- Hope Municipal Airport
- Infocomm Media Development Authority
- List of M18 roads
- M-18 (Michigan highway)
- M18 (Cape Town)
- M18 (East London)
- M18 (Johannesburg)
- M18 (Port Elizabeth)
- M18 (Pretoria)
- M18 Claymore mine
- M18 Hellcat
- M18 motorway (Great Britain)
- M18 motorway (Ireland)
- M18 recoilless rifle
- M18 smoke grenade
- Mara 18
- Messerschmitt M 18
- Messier 18
- Miles M.18
- Milwaukee Electric Tool Corporation
- Mooney M-18 Mite
- Myasishchev M-18
- PZL-Mielec M-18 Dromader
- SIG Sauer M18