oestrus vs physiological state

oestrus and physiological state both are nouns.

Word	Noun	Adjective	Verb	Adverb
oestrus	Yes	No	No	No
physiological state	Yes	No	No	No

As nouns, physiological state is a hypernym of oestrus; that is, physiological state is a word with a broader meaning than oestrus:

oestrus: applies to nonhuman mammals: a state or period of heightened sexual arousal and activity
physiological state: the condition or state of the body or bodily functions

Other hypernyms of oestrus include physical condition, physiological condition.

oestrus (noun)	physiological state (noun)
applies to nonhuman mammals: a state or period of heightened sexual arousal and activity	the condition or state of the body or bodily functions