ugliness vs appearance

ugliness and appearance both are nouns.

Word	Noun	Adjective	Verb	Adverb
ugliness	Yes	No	No	No
appearance	Yes	No	No	No

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

Other hypernyms of ugliness include visual aspect.

ugliness (noun)	appearance (noun)
qualities of appearance that do not give pleasure to the senses	the act of appearing in public view
the quality of being wicked	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