hickey vs acne

hickey and acne both are nouns.

Word	Noun	Adjective	Verb	Adverb
hickey	Yes	No	No	No
acne	Yes	No	No	No

As nouns, acne is a hypernym of hickey; that is, acne is a word with a broader meaning than hickey:

hickey: a small inflamed elevation of the skin; a pustule or papule; common symptom in acne
acne: an inflammatory disease involving the sebaceous glands of the skin; characterized by papules or pustules or comedones

hickey (noun)	acne (noun)
a temporary red mark on a person's skin resulting from kissing or sucking by their lover	an inflammatory disease involving the sebaceous glands of the skin; characterized by papules or pustules or comedones
a small inflamed elevation of the skin; a pustule or papule; common symptom in acne