Modifiers matching foam:

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

Simple categories matching lightweight:

• item,
• application,
• firearm,
• part,
• material,
• box,
• soil,
• fabric,
• plate,
• glasses,
• article,
• object,
• framework,
• issue,
• decoration,
• chains,
• bird,
• undergarment,
• metal,
• container,
• structure,
• aggregate,
• impurity,
• system,
• rock,
• packing,
• building,
• fluid,
• elements,
• ingredient,
• tire,
• component,
• clothing,
• blanket,
• alloy,
• implement,
• clothes,
• hat,
• commodity,
• helmet,
• paper,
• abrasive,
• blade,
• element,
• sled,
• outerwear,
• battery,
• gas,
• vehicle,
• fibre,
• web,
• plastic,
• head,
• assembly,
• thing,
• ball,
• beads,
• weapon,
• computer,
• furniture,
• contaminant,
• lense,
• debris,
• compound,
• medium,
• cotton,
• matter,
• substrate,
• apparel,
• support,
• shoes,
• molecule,
• particle,
• covering,
• silks,
• papers,
• textile,
• leather,
• rammer,
• weaponry,
• foam,
• parcel,
• transport,
• equipment,
• surface,
• fixture,
• unit,
• tie,
• oil,
• sword,
• filler,
• yarn,
• mail,
• vest,
• mineral,
• utensil,
• product,
• trailer,
• hardware,
• substance,
• food,
• cleaner,
• creation,
• tool,
• sign,
• garment,
• waste,
• construction,
• cloth,
• strand,
• string,
• atom,
• device,
• wood,
• wall,