- - What cowlings cover
- - The ends of 18- and 60-Across and 3- and 31-Down are types of them
- - "Gentlemen, start your ......"
- - What the Unsers start
- - Google and the like
- - They transmit power in genes perhaps
- - dodge machines
- - Inventions of Karl Benz and Rudolf Diesel
- - driving forces seen roughly to maintain spirit
- - they're on track and seen to have spirit
- - Components of cars
- - hummers in hummers
- - vehicle motors
- - their performance is improved by fans
- - Motors seen erroneously to contain spirit
- - Motorized Snow Patrol song off "A Hundred Million Suns"?
- - Firehouse vehicles
- - Car motors
- - Machines
- - Places for pistons
- - Locomotive pullers
- - Locomotives
- - Auto mechanic's concerns
- - Search tools
- - They can purr and roar
- - Motors English ensign repaired
- - Roarers and purrers
- - Train pullers
- - Power sources
- - V8s and others
- - They might backfire
- - Snow Patrol song to rev you up?
- - Purring car parts
- - Ramjets, e.g.
- - Gearhead's objects
- - Train leaders
- - Things to rev
- - They're under hoods
- - Fire trucks
- - Motors
- - They get started
- - Internet search aids
- - Some have fans
- - Firefighters
- - They sometimes purr
- - Railroad locomotives
- - Sources of force
- - Some roarers
- - Fan sites
- - Flying Fortress's foursome
- - "Car Talk" subject
- - Internet-search helpers
- - They're under some hoods
- - Wankel products
- - 35-Down's quartet
- - Turbojet and others
- - Donkeys on shipboard
- - Diesels
- - Iron horses
- - Diesel and Wankel
- - Diesel and steam
- - Donkey and diesel
- - Jet units
- - Turbojets
- - Jets, for one
- - Airport roarers
- - Machinery.
- - Power devices.
- - Sources of power.
- - Apparatus.
- - Diesels, for example.
- - Roundhouse items.
- - Mechanical tools.
- - Energy converters
- - They go to blazes
- - Car parts
- - Driving forces
- - Gas guzzlers
- - Drivers seen in crash - full of drink
- - Railway locomotives
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- [ Other definitions ]