Related by context. Frequent words. (Click for all words.) 50 Ford Crown Victorias 47 Crown Victorias 46 Priuses 45 diesel powered 43 Hyundais 43 Tahoes 43 Cobalts 42 hybrid Prius 42 Civic GX 42 Toyota Prius hybrid 42 electric hybrid 42 vanpools 42 combustion engine 42 Nissans 41 gas guzzling trucks 40 conventionally powered 40 hybrid electric 40 NGVs 40 hydrogen fuel 40 flex fuel 39 Toyota Prius 39 Compressed Natural Gas 39 compressed hydrogen 39 Escape hybrid 39 VWs 39 Honda Insight 39 Explorer SUV 39 Honda Civic hybrid 39 diesels 39 cars 39 FFVs 39 compressed natural 39 Prius 39 E# pumps 39 V6 engines 39 flywheels 38 4 cyl 38 diesel 38 idled 38 Civic Hybrid 38 rental fleets 38 Camaros 38 recharging stations 38 Tundra pickups 38 Hybrid Synergy Drive 38 Accord Hybrid 38 internal combustion engines 38 Flex Fuel 38 gas guzzling SUVs 37 NiMH batteries 37 electric hybrids 37 Volvos 37 hybrid 37 EVs 37 hybrids 37 HEVs 37 Chevrolet Volt plug 37 Escape Hybrid 37 Ford Escape Hybrid 37 gas guzzlers 37 powerplants 37 microturbines 37 Chryslers 37 dealerships 36 Lexus LS# 36 Hybrid Vehicle 36 Toyota Highlander Hybrid 36 Mercurys 36 Camaro SS 36 vehicles 36 electric 36 ForTwo 36 cleaner burning 36 Chevy Aveo 36 Fiesta subcompact 36 Oldsmobiles 36 CNG 36 hydrogen 36 SUVs 36 subcompacts 36 Toyotas 36 jalopies 36 Saturn Vue Green 36 Volt 36 Tesla 36 combustion engines 36 Nissan Leaf 35 Fords 35 hydrogen powered 35 Honda Civic Hybrid 35 electric motors 35 Smart fortwo 35 Chevy Volt 35 Smart ForTwo 35 gas guzzling 35 PHEVs 35 diesel engines 35 CNG buses 35 sputtered 35 nickel metal hydride 35 ZENN