handrail vs banister

handrail and banister both are nouns.

Word	Noun	Adjective	Verb	Adverb
handrail	Yes	No	No	No
banister	Yes	No	No	No

As nouns, handrail and banister are synonyms defined as:

handrail and banister: a railing at the side of a staircase or balcony to prevent people from falling

Other synonyms of handrail include balusters, balustrade, bannister.

handrail (noun)	banister (noun)
a railing at the side of a staircase or balcony to prevent people from falling	a railing at the side of a staircase or balcony to prevent people from falling