display vs viewing

display and viewing both are nouns.

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

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

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

display (noun)	viewing (noun)
something shown to the public	a vigil held over a corpse the night before burial
a visual representation of something	the display of a motion picture
an electronic device that represents information in visual form
exhibiting openly in public view
something intended to communicate a particular impression
behavior that makes your feelings public

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