Modifiers matching plastic:

• inert,
• standard,
• common,
• appropriate,
• polar,
• rigid,
• flexible,
• translucent,
• black,
• amorphous,
• sensitive,
• safe,
• basic,
• brittle,
• hard,
• transparent,
• resilient,
• lightweight,
• conventional,
• special,
• suitable,
• colored,
• useful,
• soft,
• color,
• washable,
• thin,
• clear,
• slippery,
• thermosetting,
• synthetic,
• solid,
• viscous,
• new,
• durable,
• light,
• nonpolar,
• industrial,
• liquid,
• heavy,
• over,
• technical,
• difficult,
• expanded,
• automotive,
• thick,
• traditional,
• modern,
• organic,
• commercial,
• convenient,
• biodegradable,
• corrosive,
• thermal,
• opaque,
• brilliant,
• fibrous,
• smooth,
• thermoset,
• impermeable,
• tough,
• resistant,
• strong,
• stable,

Simple categories matching rigid:

• material,
• sheet,
• obstacle,
• surface,
• substance,
• transformation,
• tubing,
• fastener,
• structure,
• document,
• ground,
• object,
• profile,
• motion,
• container,
• bottle,
• fixture,
• piece,
• body,
• covering,
• element,
• adhesive,
• layer,
• support,
• textile,
• shape,
• mechanism,
• part,
• polymer,
• boundary,
• coil,
• dressing,
• fibre,
• item,
• substrate,
• thread,
• cutoff,
• entity,
• cover,
• thermoplastic,
• floor,
• boot,
• unit,
• finish,
• monomer,
• movement,
• organ,
• means,
• sorbent,
• tube,
• paper,
• lining,
• aggregate,
• cloth,
• deck,
• food,
• alteration,
• hanger,
• class,
• foundation,
• filler,
• portion,
• wall,
• representation,
• plate,
• member,
• pipe,
• mineral,
• macromolecule,
• watercraft,
• group,
• splint,
• implement,
• fabric,
• display,
• vehicle,
• foam,
• gel,
• plant,
• obstruction,
• feature,
• cement,
• metal,
• devices,
• frame,
• stick,
• instrumentation,
• transparency,
• deposit,
• matrix,
• post,
• rock,
• casing,
• construction,
• fiber,
• system,
• hitch,
• appliance,
• pavement,
• connector,
• medium,
• measure,
• cylinder,
• airfoil,
• change,
• connection,
• appendage,
• matter,
• barrier,
• tool,
• luggage,
• strip,
• sector,
• web,
• component,
• panel,
• plastic,
• molecule,
• base,
• shaft,
• particle,
• carrier,
• instrument,
• bed,
• rod,
• armour,
• solid,
• device,
• protein,
• article,
• block,
• tissue,
• organs,
• case,
• resin,
• packing,
• insulation,
• space,
• package,
• tip,
• sphere,
• product,
• fixing,
• form,
• architecture,