Modifiers matching rubber:

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

Simple categories matching thermoset:

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