Simple categories matching immiscible:

• mixture,
• substance,
• fluid,
• liquid,
• material,
• phase,
• system,
• metal,
• compound,

Members with property immiscible:

• tramp_oil,
• water,
• hydrocarbon,
• air,
• liquid,
• organic_liquid,
• gas,
• emulsion,
• gallium,
• gasoline,
• silicone_oil,
• hydrocarbon_liquid,
• oil,
• alcohol,
• suspended_solid,
• solid,
• silicone,
• mixture,
• nitrogen_gas,
• higher_alcohol,
• methane_gas,
• glycerin,
• solvent,
• dispersed_liquid,
• aqueous_liquid,
• polymer,
• mercury,