steward vs flight attendant

steward and flight attendant both are nouns.

Word	Noun	Adjective	Verb	Adverb
steward	Yes	No	No	No
flight attendant	Yes	No	No	No

As nouns, steward and flight attendant are synonyms defined as:

steward (noun)	flight attendant (noun)
someone who manages property or other affairs for someone else	an attendant 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