When Doubled Kids Term For A Train Crossword Clue4 Letters

One confident answer with explanation of the wordplay

CHOO
Best match
C
H
O
O

When doubled ('CHOO CHOO'), it is a classic child's term for a train. The clue 'when doubled' indicates the 4-letter answer is repeated to form the familiar word.

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Other possible answers
TOOTToot-toot is a sound associated with trains, though choo-choo is the more classic kids' term
PUFFPuff-puff is used in some regions as a child's term for a train

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