Clue: When repeated, a toy train

Answer: CHOO

Length: 4

---

Similar Clues:

• Speedy Amtrak train (ACELA with 5 letters)
• Amtrak's bullet train (ACELA with 5 letters)
• Amtrak's "bullet train" (ACELA with 5 letters)
• Amtrak train (ACELA with 5 letters)
• Fast Amtrak train (ACELA with 5 letters)
• Amtrak bullet train (ACELA with 5 letters)
• Amtrak high-speed train (ACELA with 5 letters)
• Zippy Amtrak train (ACELA with 5 letters)
• Train with service to BWI airport (ACELA with 5 letters)
• Name of Amtrak's fast train (ACELA with 5 letters)