self-starter

nouns

an energetic person with unusual initiative
self-starter
is a type of (narrower)
a highly energetic and indefatigable person
ball of fire, fireball, human dynamo, powerhouse
an electric starting motor that automatically starts an internal-combustion engine
self-starter
is a part of
a heat engine in which combustion occurs inside the engine rather than in a separate furnace; heat expands a gas that either moves a piston or turns a gas turbine
ICE, internal-combustion engine
is a type of (narrower)
an electric motor for starting an engine
starter, starter motor, starting motor