rocket salad vs arugula

rocket salad and arugula both are nouns.

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

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

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

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

rocket salad (noun)	arugula (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