Modifiers matching foam:

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

Simple categories matching pliant:

• foam,
• sheeting,
• cloth,
• material,
• fabric,