steward vs air hostess

steward and air hostess both are nouns.

Word	Noun	Adjective	Verb	Adverb
steward	Yes	No	No	No
air hostess	Yes	No	No	No

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

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

steward (noun)	air hostess (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