1. A fertile spot in a sandy or barren desert.

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

• forses,
• oices,
• asees,
• lases,
• coauses,
• usses,
• coarses,
• arses,
• ouses,
• coaces,
• obsees,
• ourses,
• asess,
• ouces,
• asest,
• tases,
• sorses,
• alses,
• iuses,
• easee

The plural of the "oases" can be the "oases".

The singular of the "oases" can be the "oa".