Petroselinum crispum neapolitanum vs flat-leaf parsley

Petroselinum crispum neapolitanum and flat-leaf parsley both are nouns.

Word	Noun	Adjective	Verb	Adverb
Petroselinum crispum neapolitanum	Yes	No	No	No
flat-leaf parsley	Yes	No	No	No

As nouns, Petroselinum crispum neapolitanum and flat-leaf parsley are synonyms defined as:

Petroselinum crispum neapolitanum and flat-leaf parsley: a variety of parsley having flat leaves

Other synonyms of Petroselinum crispum neapolitanum include Italian parsley.

Petroselinum crispum neapolitanum (noun)	flat-leaf parsley (noun)
a variety of parsley having flat leaves	a variety of parsley having flat leaves