Route to Freedom for Many Slaves: Underground __

This page is the CodyCross answer for the clue below from Science Lab, Group 313, Puzzle 5 (Vaporization).

Question is: Route to Freedom for Many Slaves: Underground __

and the answer is: RAILROAD

Word Meaning:

RAILROAD — (chiefly US, Philippines) A permanent track consisting of fixed metal rails to drive trains or similar motorized vehicles on.

Definitions from Wiktionary.

Route to freedom for many slaves: Underground __ — CodyCross Answer | CodyCross Solutions