dynamo
[noun]
Synonyms: hustler, go-getter, live wire, peeler, rustler, self-starter

[TahlilGaran] English Synonym Dictionary ▲

dy‧na‧mo /ˈdaɪnəməʊ $ -moʊ/ noun (plural dynamos) [countable]
[Date: 1800-1900; Origin: dynamoelectric machine (1800-1900)]

1. a machine that changes some other form of power directly into electricity:
bicycle lights powered by a dynamo

2. someone who is excited about what they do and who puts a lot of energy into it:
the team’s midfield dynamo

3. something that has a strong effect on something else, and that makes things happen:
Oil is the dynamo of the country’s economy.

[TahlilGaran] Dictionary of Contemporary English ▲