garden rocket vs rocket salad

garden rocket and rocket salad both are nouns.

Word	Noun	Adjective	Verb	Adverb
garden rocket	Yes	No	No	No
rocket salad	Yes	No	No	No

As nouns, garden rocket and rocket salad are synonyms defined as:

garden rocket and rocket salad: erect European annual often grown as a salad crop to be harvested when young and tender

Other synonyms of garden rocket include arugula, Eruca sativa, Eruca vesicaria sativa, rocket, roquette.

garden rocket (noun)	rocket salad (noun)
erect European annual often grown as a salad crop to be harvested when young and tender	erect European annual often grown as a salad crop to be harvested when young and tender