3-D vs appearance

3-D and appearance both are nouns.

Word	Noun	Adjective	Verb	Adverb
3-D	Yes	No	No	No
appearance	Yes	No	No	No

As nouns, appearance is a hypernym of 3-D; that is, appearance is a word with a broader meaning than 3-D:

3-D (noun)	appearance (noun)
having a three-dimensional form or appearance	the act of appearing in public view
a movie with images having three dimensional form or appearance	formal attendance (in court or at a hearing) of a party in an action
	pretending that something is the case in order to make a good impression
	outward or visible aspect of a person or thing
	a mental representation
	the event of coming into sight