steward vs defender

steward and defender both are nouns.

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

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

Other hypernyms of steward include guardian, protector, shielder.

steward (noun)	defender (noun)
someone who manages property or other affairs for someone else	a person who cares for persons or property
a union member who is elected to represent fellow workers in negotiating with management	a fighter who holds out against attack
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