Simple categories matching isotropic:

• fluid,
• material,
• system,
• polymer,
• substance,
• liquid,
• metal,
• conductor,
• substrate,
• antenna,
• solid,
• phase,
• solvent,
• fiber,
• medium,
• particle,
• plate,

Members with property isotropic:

• aluminium_plate,
• steel,
• vesicle_suspension,
• li,
• aluminum,
• solid_steel,
• powder,
• aluminium_alloy,
• whip_antenna,
• aluminium,
• solution,
• metal,
• glycerin,
• liquid,
• glass,
• cubic_material,
• soil,
• water,
• volcanic_glass,
• polymer,
• aluminium_metal,
• co,
• glasses,
• structural_steel,
• glycerine,
• gas,
• air,
• pectin,
• pure_copper,
• rubber,
• amorphous_material,
• cubic_crystal,
• toluene,
• al,
• spherical_particle,
• pure_metal,
• ge,
• wire,
• blue_phase,
• powdered_glass,
• beryllium,
• resin,
• glass_compound,
• unstressed_silicon,
• radio_channel,
• glassy_polymer,
• bulk_product,
• bulk_liquid,
• ag,
• amorphous_silica,
• cubic_metal,
• organic_compound,
• polystyrene,
• liquid_helium,
• gas_phase,
• gold,
• cu,
• plastic,
• stainless,
• gelatin,
• hydrogen_gas,
• sedimentary_rock,
• gd,
• iron,
• cortical_bone,
• brass,
• centrosymmetric_crystal,
• polycrystalline_iron,
• polycrystalline_material,
• ferrite,
• biological_solution,
• polyurethane_elastomer,
• common_glass,
• celluloid,
• tungsten,
• gamma_alumina,
• gel,
• metal_alloy,
• fluid,
• cement,
• si,
• indium,
• simple_fluid,
• liquid_ho,
• titanium,
• ac,
• high_polymer,
• zinc,
• petroleum_pitch,
• nickel,
• paste,
• silica,
• soft_ferrite,
• powdered_iron,
• free-electron_gas,
• oil,
• solid_matrix,
• rock,
• nylon,
• copper,
• tetrachloromethane,
• hexane,
• ni,
• completion_gel,
• cement_paste,
• vitreous_silica,