dress rehearsal vs dry run

dress rehearsal and dry run both are nouns.

Word	Noun	Adjective	Verb	Adverb
dress rehearsal	Yes	No	No	No
dry run	Yes	No	No	No

As nouns, dry run is a hypernym of dress rehearsal; that is, dry run is a word with a broader meaning than dress rehearsal:

dress rehearsal: a full uninterrupted rehearsal in costumes shortly before the first performance
dry run: a practice session in preparation for a public performance (as of a play or speech or concert)

Other hypernyms of dress rehearsal include rehearsal.

dress rehearsal (noun)	dry run (noun)
a full uninterrupted rehearsal in costumes shortly before the first performance	a practice session in preparation for a public performance (as of a play or speech or concert)