rose water vs essence

rose water and essence both are nouns.

Word	Noun	Adjective	Verb	Adverb
rose water	Yes	No	No	No
essence	Yes	No	No	No

As nouns, essence is a hypernym of rose water; that is, essence is a word with a broader meaning than rose water:

Other hypernyms of rose water include perfume.

rose water (noun)	essence (noun)
perfume consisting of water scented with oil of roses	a toiletry that emits and diffuses a fragrant odor
	the choicest or most essential or most vital part of some idea or experience
	the central meaning or theme of a speech or literary work
	any substance possessing to a high degree the predominant properties of a plant or drug or other natural product from which it is extracted