1. A void sunless waste in the depths of the earth; the infernal regions, specially the place of punishment.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• artamuss,
• arthamus,
• cartamus,
• cartahmus,
• lactarous,
• lahtyrus,
• tarexacum,
• tartarean,
• tartaruan,
• rartarus,
• fartarus,
• gartarus,
• yartarus,
• tatarus,
• tarterus,
• tartarte,
• tastabud,
• varatrum,
• dartrus,
• tartrous

• Tartary,
• tartrate,
• taurotragus,
• tartarean,
• tartaric,
• tartar,
• tarter.

The adjective form of the word "Tartarus" is "Tartarean".

The plural form of the word "tartarus" is "tartari".

The singular form of the word "Tartarus" is "Tartarus". There is no distinct singular form for this noun.