hostess vs steward

hostess and steward both are nouns.

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

As nouns, steward is a hypernym of hostess; that is, steward is a word with a broader meaning than hostess:

Other hypernyms of hostess include flight attendant, adult female, woman.

hostess (noun)	steward (noun)
a woman innkeeper	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
a woman host	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