headwaiter vs maitre d'hotel

headwaiter and maitre d'hotel both are nouns.

Word	Noun	Adjective	Verb	Adverb
headwaiter	Yes	No	No	No
maitre d'hotel	Yes	No	No	No

As nouns, headwaiter and maitre d'hotel are synonyms defined as:

headwaiter and maitre d'hotel: a dining-room attendant who is in charge of the waiters and the seating of customers

Other synonyms of headwaiter include captain, maitre d'.

headwaiter (noun)	maitre d'hotel (noun)
a dining-room attendant who is in charge of the waiters and the seating of customers	a dining-room attendant who is in charge of the waiters and the seating of customers