French dressing vs sauce vinaigrette

French dressing and sauce vinaigrette both are nouns.

Word	Noun	Adjective	Verb	Adverb
French dressing	Yes	No	No	No
sauce vinaigrette	Yes	No	No	No

As nouns, French dressing and sauce vinaigrette are synonyms defined as:

French dressing and sauce vinaigrette: oil and vinegar with mustard and garlic

Other synonyms of French dressing include vinaigrette.

French dressing (noun)	sauce vinaigrette (noun)
oil and vinegar with mustard and garlic	oil and vinegar with mustard and garlic