Synonyms for main
primary (principal, ,
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key (central, big, grand
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core (staple, cardinal, basic
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chief (head, senior, superior
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master
dominant
foremost
premier
predominant
base
trunk
primal
principal part
See all synonyms for mainSynonyms for motor
engine (drive, speed, jet
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automobile (auto, motor vehicle, motorcar
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electric motor (drive motor, electrical motor, electric engine
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See all synonyms for motor