Modifiers matching foam:

• polymeric,
• aqueous,
• cellular,
• plastic,
• traditional,
• hydrophobic,
• conventional,
• organic,
• surrounding,
• metal,
• rigid,
• inexpensive,
• thicker,
• synthetic,
• stable,
• lightweight,
• resilient,
• natural,
• semirigid,
• dense,
• resinous,
• edible,
• sensitive,
• thermoplastic,
• porous,
• expanded,
• pliant,
• thermosetting,
• pliable,
• solid,
• brittle,
• flexible,
• soft,
• structural,
• acoustic,
• hydrophilic,

Simple categories matching rigid:

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