Modifiers matching tunnel:

• large,
• larger,
• urban,
• underground,
• small,

Simple categories matching urban:

• obstacle,
• bird,
• theme,
• animal,
• area,
• pest,
• region,
• structure,
• education,
• surface,
• association,
• division,
• function,
• household,
• outing,
• fixture,
• utility,
• activity,
• encroachment,
• facility,
• component,
• form,
• waste,
• fitting,
• renewal,
• institution,
• space,
• craftsman,
• quality,
• art,
• mammal,
• infrastructure,
• fabric,
• drainage,
• hospital,
• life,
• yoga,
• chemical,
• pavement,
• strength,
• monument,
• film,
• migration,
• center,
• district,
• university,
• decay,
• purpose,
• use,
• resource,
• process,
• network,
• employment,
• insect,
• expansion,
• hardware,
• entity,
• college,
• market,
• predator,
• data,
• black,
• genre,
• material,
• pet,
• morphology,
• event,
• home,
• sector,
• force,
• group,
• architecture,
• metabolism,
• ruin,
• density,
• characteristic,
• source,
• green,
• critter,
• danger,
• culture,
• residue,
• place,
• construction,
• core,
• detritus,
• movement,
• environment,
• feature,
• dwelling,
• music,
• system,
• tunnel,
• community,
• instrument,
• society,
• industry,
• character,
• trait,
• pollutant,
• vermin,
• business,
• furniture,
• dust,
• neutral,
• furnishing,
• ministry,
• plant,
• agent,
• trend,
• action,
• professional,
• equipment,
• centre,
• location,
• medium,
• article,
• thing,
• works,
• opponent,
• agglomeration,
• condition,
• scene,
• setting,
• vehicle,
• school,
• property,
• wearable,
• unit,
• establishment,
• issue,
• occupation,
• neighborhood,
• railway,
• site,
• ornament,
• phenomenon,
• wastewater,
• history,
• mobility,
• change,
• contaminant,
• housing,
• challenge,
• oasis,
• tree,
• body,
• sphere,
• affairs,
• program,
• subdivision,
• pollution,
• transport,
• profession,
• benefit,
• development,
• scavenger,
• job,
• commerce,
• inhabitant,
• zone,
• wage,
• hazard,
• host,
• situation,
• folk,
• worker,
• interference,
• land,
• outlet,
• attribute,
• building,
• tissue,
• administration,
• tourism,
• style,
• dweller,
• redevelopment,
• waterfront,
• enterprise,
• waterway,
• african,
• incident,
• population,
• creature,
• work,
• item,
• object,
• move,
• hub,
• service,