French dressing vs vinaigrette

French dressing and vinaigrette both are nouns.

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

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

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

Other synonyms of French dressing include sauce vinaigrette.

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