Modifiers matching rubber:

• natural,
• hard,
• resilient,
• conductive,
• soft,
• stock,
• expensive,
• reliable,
• ordinary,
• organic,
• raw,
• thermoset,
• elastic,
• conventional,
• polar,
• porous,
• inexpensive,
• liquid,
• special,
• softer,

Simple categories matching thermoset:

• rubber,
• polymer,
• material,
• adhesive,
• resin,
• plastic,
• elastomer,
• system,
• polyester,