1. One who uses, treats, or occupies.

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

• diser,
• uesr,
• usein,
• usew,
• isel,
• usely,
• ouver,
• upir,
• useda,
• ouset,
• uesers,
• usses,
• burser,
• usure,
• usess,
• usder,
• oused,
• esyer,
• usert,
• ser

• usher,
• usury,
• usrey,
• usry,
• USERY,
• ussery,
• ussr,
• ussher.

The adjective form of the word "user" is "user-friendly".

The plural of the "user" can be the "users".

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