Modifiers matching glass:

• resistant,
• flat,
• hard,
• black,
• inorganic,
• inexpensive,
• persian,
• colored,
• industrial,
• under,
• natural,
• decorative,
• thin,
• polished,
• artificial,
• clear,
• durable,
• pure,
• amorphous,
• prepared,
• cheap,
• typical,
• expensive,
• curved,
• transparent,
• plane,
• melting,
• working,
• cold,
• broken,
• blown,
• small,
• architectural,
• soft,
• safe,
• ornamental,
• interior,
• stained,
• functional,
• large,
• beautiful,
• optical,
• inhomogeneous,
• harder,
• warm,
• narrow,
• textured,
• handmade,
• hollow,
• fine,
• special,
• nearby,
• tall,
• dimensional,
• fragile,
• fixed,
• grown,
• opaque,
• coloured,
• antique,

Simple categories matching optical:

• communications,
• sensor,
• disease,
• property,
• instrument,
• material,
• system,
• product,
• implementation,
• part,
• perturbation,
• parameter,
• assembly,
• entity,
• state,
• element,
• item,
• concept,
• equipment,
• device,
• apparatus,
• surface,
• medium,
• network,
• glass,
• information,
• observation,
• devices,
• solution,
• attribute,
• windows,
• portion,
• paraphernalia,
• lens,
• disk,
• machine,
• scopes,
• switch,
• dielectric,
• transformation,
• correction,
• appliance,
• base,
• deflector,
• sensation,
• irregularity,
• indicator,
• fibre,
• power,
• pattern,
• unit,
• plate,
• penalty,
• hardware,
• section,
• texture,
• disc,
• aberration,
• marker,
• phenomenon,
• structure,
• display,
• instrumentation,
• munition,
• module,
• data,
• function,
• circuit,
• radiation,
• signaling,
• article,
• wave,
• case,
• coating,
• consideration,
• reflector,
• energy,
• detector,
• amplifier,
• artifact,
• impression,
• measurement,
• losses,
• error,
• magazine,
• substrate,
• drive,
• coupling,
• process,
• filter,
• activity,
• force,
• input,
• reader,
• block,
• communication,
• distortion,
• film,
• crystal,
• fiber,
• object,
• substance,
• contrivance,
• shutter,
• pathology,
• processing,
• figure,
• procedure,
• characteristic,
• glasses,
• quality,
• coupler,
• disorder,
• waveguide,
• defect,
• image,
• layer,
• command,
• quantity,
• catalyst,
• resin,
• performance,
• particle,
• market,
• point,
• sheet,
• application,
• condition,
• mode,
• constant,
• imperfection,
• means,
• elements,
• effect,
• carrier,
• interaction,
• experiment,
• value,
• measure,
• component,
• interference,
• field,
• details,
• interferometer,
• feature,
• lense,