pimple vs acne

pimple and acne both are nouns.

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

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

pimple: 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

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