metro ?:

1. underground

American english word "metro"(underground) occurs in sets:

EF_Practice FIle_p. 90 At the airport
UNIT 3 Cutting Edge Pre-Intermediate Student's Book
Marysia_12th Jan. 2024

2. tube

American english word "metro"(tube) occurs in sets:

UNIT 1 Cutting Edge Intermediate Student's Book

3. underground train

American english word "metro"(underground train) occurs in sets:

Kolumna 1 M8
Transport słownictwo