• aupertax,
• zupertax,
• xupertax,
• dupertax,
• eupertax,
• wupertax,
• sypertax,
• shpertax,
• sjpertax,
• sipertax,
• s8pertax,
• s7pertax,
• suoertax,
• supretax,
• supertaxx,
• supertix,
• supertex,
• superntax,
• supertaks,
• supertexs

• subvert,
• suppertime,
• subpart,
• suppurative,
• suppurate,
• suppuration,
• supertitle,
• supertanker,
• support,
• supportable,
• superhet,
• supertonic.

The adjective form of the word "supertax" is "supertaxable". Example: The supertaxable income for high earners is subject to an additional surcharge.

The plural of the "supertax" can be the "supertaxes".

The singular of the "supertax" can be the "supertax".