The best replacement for engine is motor.

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Your alternative for engine is not listed? Suggest!
Speaking about engine, one probably shouldn't forget about blower.

Other search terms related to engine and their ratings are:
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★ thomas
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diesel
You have in mind a companion for engine and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of engine in all years. Click on graph for more.
engine
motor
gasoline engine