display vs ostentation

display and ostentation both are nouns.

Word	Noun	Adjective	Verb	Adverb
display	Yes	No	Yes	No
ostentation	Yes	No	No	No

As nouns, ostentation is a hyponym of display; that is, ostentation is a word with a more specific, narrower meaning than display:

Other hyponyms of display include acting out, array, screening, showing, viewing, sight, fanfare, flash, flaunt, presentation.

display (noun)	ostentation (noun)
something shown to the public	pretentious or showy or vulgar display
a visual representation of something	lack of elegance as a consequence of being pompous and puffed up with vanity
an electronic device that represents information in visual form	a gaudy outward display
exhibiting openly in public view
something intended to communicate a particular impression
behavior that makes your feelings public

display (verb)	ostentation (verb)
to show, make visible or apparent
attract attention by displaying some body part or posing; of animals