Modifiers matching foam:

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

Simple categories matching resinous:

• material,
• compound,
• hardwood,
• spice,
• wood,
• matter,
• leaf,
• softwood,
• film,
• polymer,
• substance,
• plant,
• exudation,
• tree,
• herb,
• component,
• adhesive,
• resin,
• foam,
• substrate,