Related by context. Frequent words. (Click for all words.) 78 hybrid 74 Hybrids 63 electric hybrids 63 electric hybrid 62 diesels 62 Hybrid 62 Prius 61 EVs 61 hybrid electric 57 Chevy Volt 57 Civic Hybrid 56 PHEV 55 Toyota Prius 55 Volt 55 SUVs 55 powertrains 55 flex fuel 54 Chevrolet Volt 53 Nissan Leaf 53 i MiEV 52 sedans 52 hatchbacks 52 Ford Escape Hybrid 52 Honda Insight 52 diesel engines 51 Toyota Prius hybrid 51 crossovers 51 HEV 51 hydrogen powered 51 vehicles 51 Prius hybrid 51 RAV4 50 Mazda6 50 subcompact 50 Priuses 50 smart fortwo 50 diesel powered 50 alternative fuels 50 internal combustion 49 cylinder engines 49 minicar 49 Lexus RX 49 varieties 49 coupes 49 Elantra 49 cars 49 Buicks 48 crossover SUV 48 zero emission 48 Mazda3 48 subcompacts 48 minivans 48 Tesla Roadster 48 internal combustion engines 48 hatchback 47 combustion engine 47 midsize sedan 47 diesel 47 Ford Escape 47 powertrain 47 gas guzzlers 47 gas guzzler 47 lithium ion batteries 47 Honda Fit 46 compact sedan 46 Nissan LEAF 46 Yaris 46 gas guzzling vehicles 46 CR V 46 hydrogen fuel 46 exotics 46 EcoBoost 46 luxury sedans 46 automakers 45 Mazda2 45 Roadster 45 cultivars 45 mpg 45 Saturn Vue 45 Hummers 45 Transit Connect 45 internal combustion engine 45 Cruze 45 lithium ion 45 CR Z 45 electric 45 gas guzzling SUVs 45 Nissan 45 Kizashi 45 supercars 45 dealer showrooms 45 Honda Motor Co. 45 door hatchback 44 ethanol blends 44 Buick LaCrosse 44 Jetta 44 powerplants 44 Automakers 44 Chevrolet Equinox 44 diesel engine 44 sedan