essence vs cologne

essence and cologne both are nouns.

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

As nouns, cologne is a hyponym of essence; that is, cologne is a word with a more specific, narrower meaning than essence:

essence (noun)	cologne (noun)
a toiletry that emits and diffuses a fragrant odor	a perfumed liquid made of essential oils and alcohol
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