Category Nuances for tunnel:

• inaccessible,
• underground,
• free,
• concrete,
• distinct,
• overhead,
• permanent,
• rigid,
• wooden,
• major,
• physical,
• attractive,
• spatial,
• tubular,
• liquid,
• static,
• narrow,
• elaborate,
• hydraulic,
• discrete,
• individual,
• protective,
• inside,
• industrial,
• curved,
• strange,
• foreign,
• commercial,
• special,
• large,
• environmental,
• closed,
• noisy,
• embedded,
• hidden,
• difficult,
• hard,
• rough,
• residential,
• horticultural,
• electronic,
• experienced,
• interactive,
• stable,
• subterranean,
• long,
• operational,
• stimulating,
• outdoor,
• strategic,
• artificial,
• waterproof,
• urban,
• linear,
• deep,
• important,
• technical,
• expensive,
• smart,
• military,
• absorptive,
• hollow,
• challenging,
• heavy,
• permeable,
• extensive,
• exposed,
• interesting,
• huge,
• appurtenant,
• social,
• under,
• related,
• agricultural,
• sensitive,
• open,
• subsurface,
• critical,
• semipermanent,
• metallic,
• larger,
• fixed,
• civil,
• visible,
• metal,
• architectural,
• unusual,
• nearby,
• general,
• topological,
• underwater,
• complex,
• safe,
• dark,

Simple Categories for tunnel:

• structure,
• artifact,
• thing,
• facility,
• conduit,
• cavity,
• passage,
• passageway,
• installation,
• location,
• access,
• surface,
• path,
• object,
• excavation,
• toy,
• part,
• hole,
• formation,
• corridor,
• entity,