Modifiers matching struggle:

• political,
• physical,
• nonviolent,
• violent,
• internal,
• real,
• social,
• armed,
• personal,
• military,
• open,
• managerial,
• economic,
• ongoing,
• shared,
• world,
• diverse,
• public,
• legitimate,
• common,
• mundane,

Simple categories matching open:

• ampoule,
• area,
• seam,
• environment,
• space,
• land,
• grassland,
• section,
• water,
• housing,
• structure,
• shellfish,
• design,
• institution,
• flower,
• receptacle,
• nester,
• system,
• liquid,
• dish,
• vegetation,
• resistance,
• country,
• forest,
• meat,
• body,
• community,
• location,
• air,
• facility,
• function,
• fixture,
• fabric,
• container,
• building,
• orifice,
• workplace,
• situation,
• struggle,
• fencing,
• prey,
• form,
• fire,
• event,
• region,
• stairway,
• information,
• projection,
• wall,
• gesture,
• powerboat,
• basin,
• establishment,
• forum,
• medium,
• conveyance,
• knowledge,
• face,
• cover,
• box,
• substance,
• protocol,
• terrain,
• patch,
• curve,
• aquarium,
• roll,
• issue,
• organization,
• wound,
• designer,
• appliance,
• territory,
• mollusc,
• article,
• source,
• competition,
• beam,
• car,
• implementation,
• type,
• pit,
• file,
• highway,
• specification,
• construction,
• vessel,
• group,
• pattern,
• stage,
• program,
• lagoon,
• door,
• vehicle,
• package,
• entity,
• image,
• office,
• burning,
• ocean,
• material,
• shelter,
• perch,
• waterway,
• business,
• collocation,
• society,
• standard,
• boat,
• conflict,
• passage,
• canopy,
• flow,
• sector,
• food,
• light,
• unit,
• science,
• document,
• cell,
• room,
• service,
• equipment,
• enclosure,
• shape,
• meeting,
• bivalve,
• site,
• position,
• network,
• field,
• habitat,
• thing,
• conduit,
• watercourse,
• woodland,
• clearing,
• view,
• place,
• feature,
• object,
• application,
• nut,
• grain,
• ground,
• activity,
• excavation,
• part,
• version,
• volume,
• surface,
• code,
• procedure,
• marketplace,
• envelope,
• sea,
• item,
• menu,
• market,