cologne vs essence

cologne and essence both are nouns.

Word	Noun	Adjective	Verb	Adverb
cologne	Yes	No	No	No
essence	Yes	No	No	No

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

Other hypernyms of cologne include perfume.

cologne (noun)	essence (noun)
a perfumed liquid made of essential oils and alcohol	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