Modifiers matching rubber:

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

Simple categories matching thermoset:

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