steward vs stewardess

steward and stewardess both are nouns.

Word	Noun	Adjective	Verb	Adverb
steward	Yes	No	No	No
stewardess	Yes	No	No	No

As nouns, stewardess is a hyponym of steward; that is, stewardess is a word with a more specific, narrower meaning than steward:

Other hyponyms of steward include air hostess, hostess, air host.

steward (noun)	stewardess (noun)
someone who manages property or other affairs for someone else	a woman steward on an airplane
a union member who is elected to represent fellow workers in negotiating with management
one having charge of buildings or grounds or animals
an attendant on an airplane
the ship's officer who is in charge of provisions and dining arrangements