estrus vs physiological state

estrus and physiological state both are nouns.

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

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

estrus: 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 estrus include physical condition, physiological condition.

estrus (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