dysfunction vs ED

dysfunction and ED both are nouns.

Word	Noun	Adjective	Verb	Adverb
dysfunction	Yes	No	No	No
ED	Yes	No	No	No

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

dysfunction: (medicine) any disturbance in the functioning of an organ or body part or a disturbance in the functioning of a social group
ED: impotence resulting from a man's inability to have or maintain an erection of his penis

Other hyponyms of dysfunction include erectile dysfunction, male erecticle dysfunction, palsy, paralysis.

dysfunction (noun)	ED (noun)
(medicine) any disturbance in the functioning of an organ or body part or a disturbance in the functioning of a social group	impotence resulting from a man's inability to have or maintain an erection of his penis