Word Study
trunk line
THESAURUS
trunk line
L, WATS, WATS line, branch, cable, cable railway, co-ax, coaxial cable, cog railway, concentric cable, el, electric railway, elevated, elevated railway, embankment, feeder, feeder line, gravity-operated railway, horse railway, junction, light railroad, line, main line, metro, monorail, party line, private line, rack railway, rack-and-pinion railway, rail, rail line, railroad, railway, roadbed, roadway, sidetrack, siding, street railway, streetcar line, subway, switchback, telegraph cable, telegraph line, telephone line, terminal, terminus, track, tram, tramline, trestle, trolley line, trunk, tube, turnout, underground, wire lineFor further exploring for "trunk line" in Webster Dictionary Online