nouns
an electric motor for starting an engine
a contestant in a team sport who is in the game at the beginning
is a type of (narrower)
a person who participates in competitions
the official who signals the beginning of a race or competition
any new participant in some activity
food or drink to stimulate the appetite (usually served before a meal or as the first course)
a hand tool consisting of a rotating shaft with parallel handle
a culture containing yeast or bacteria that is used to start the process of fermentation or souring in making butter or cheese or dough
"to make sourdough you need a starter"
is a type of (narrower)
(biology) the growing of microorganisms in a nutrient medium (such as gelatin or agar)
"the culture of cells in a Petri dish"