petit dejeuner vs continental breakfast

petit dejeuner and continental breakfast both are nouns.

Word	Noun	Adjective	Verb	Adverb
petit dejeuner	Yes	No	No	No
continental breakfast	Yes	No	No	No

As nouns, petit dejeuner and continental breakfast are synonyms defined as:

petit dejeuner and continental breakfast: a breakfast that usually includes a roll and coffee or tea

petit dejeuner (noun)	continental breakfast (noun)
a breakfast that usually includes a roll and coffee or tea	a breakfast that usually includes a roll and coffee or tea