Modifiers matching insulator:

• electrical,
• ceramic,
• thermal,
• organic,
• synthetic,
• clear,
• ionic,
• solid,
• transparent,
• elongated,
• common,
• external,
• liquid,
• inorganic,
• stable,
• fluid,
• suitable,
• important,
• domestic,
• crystalline,
• nonconductive,
• elastic,
• simple,
• conventional,
• electric,
• hard,
• supporting,
• slippery,
• polymeric,
• natural,
• polar,
• good,
• protective,
• conductive,
• biological,
• periodic,
• durable,
• hydrophilic,
• convenient,
• exotic,
• familiar,
• traditional,
• amorphous,
• white,
• available,

Simple categories matching slippery:

• fabric,
• solid,
• fish,
• insulator,
• surface,
• material,
• layer,
• floor,
• contaminant,
• ground,
• course,
• substance,
• area,
• item,
• lubricant,
• prey,
• coating,
• substrate,
• plastic,
• coin,
• reptile,
• condition,
• fiber,
• cloth,
• stuff,
• food,
• sediment,
• flooring,