Synonyms of tunnel

1 Syllable
thill, tube, dug, drift, burr, burrs, pit, mine, hole, shaft
2 Syllables
burrow, digging, washers, subway, gouging, fluting, catting, channels, gouged, channel, crawlway, sub-way, helve, catted, adit, crosscut
3 Syllables
whetstone, pipette, burrowed, burrowing, diaphysis, passage, alleyway, tideway, underpass, channeled, undercut
4 Syllables
undercutting, excavate, excavating, undermine, undermined, excavated