• estrus,
• estrous,
• kestrus,
• lestrus,
• pestrus,
• 0estrus,
• 9estrus,
• owstrus,
• osstrus,
• odstrus,
• orstrus,
• o4strus,
• o3strus,
• oeatrus,
• oeztrus,
• oextrus,
• oestres,
• oesters,
• oestrusse,
• eistrus

• oestridae,
• oestriol,
• oestrogen,
• Oestreich,
• oestrone.

The adjective form of the word "oestrus" is "oestrous".

The plural form of "oestrus" is "oestrous"

The singular form of the word "oestrus" is "estrus"