Related by context. Frequent words. (Click for all words.) 74 hybrids 67 Hybrid 58 hybrid 57 diesels 56 Crossovers 53 Diesels 51 HEVs 50 CUV 50 electric hybrids 50 Chevy Volt 50 PHEVs 49 Volt 49 V6 engines 49 powertrains 48 EVs 48 Honda Insight 47 hybrid powertrain 47 crossovers 47 Honda Civic Hybrid 47 internal combustion engines 47 electric powertrain 47 electric hybrid 47 diesel engines 47 drivetrains 47 hybrid electric 47 PHEV 47 Highlander Hybrid 47 Minivans 46 SUVs 46 Escape Hybrid 46 cylinder engines 46 minicars 46 Hatchback 45 Toyota Prius 45 Chevrolet Volt 45 subcompact 45 Smart Fortwo 45 midsize SUV 45 Prius 45 internal combustion 44 Convertibles 44 Transit Connect Electric 44 Automakers 44 Sedans 44 Chryslers 44 Plug ins 44 combustion engine 44 hatchbacks 44 Carmakers 44 electric propulsion 43 Nissan Leaf 43 crossover SUV 43 Saturn Aura 43 Toyota Prius hybrid 43 nonpolluting 43 electric motors 43 compact crossover 43 Tesla Roadster 43 Mitsubishi i MiEV 43 Buick LaCrosse 43 combustion engines 42 Fusion Hybrid 42 Hydrogen 42 #.#L V6 42 mpg 42 Fuel Efficiency 42 hybrid propulsion 42 Chevy Equinox 42 Honda CR Z 42 RAV4 42 MKZ 42 Nissan Versa 42 sedans 42 Electric Vehicle 42 Elantra 42 Aptera 42 Plants 42 HEV 42 subcompacts 42 supercars 42 Lithium ion batteries 42 i MiEV 42 turbo diesel 41 Ford Transit Connect 41 coupes 41 midsize sedans 41 SUVS 41 flex fuel 41 Pickups 41 diesel powered 41 Nissans 41 alternative fuels 41 diesel engine 41 Biofuels 41 Nissan Cube 41 Midsize 41 exhaust emissions 41 Civic Hybrid 41 hybridized 41 diesel 41 Camry Hybrid