appearance vs appearing

appearance and appearing both are nouns.

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

As nouns, appearance and appearing are synonyms defined as:

appearance and appearing: formal attendance (in court or at a hearing) of a party in an action

Other synonyms of appearance include coming into court.

appearance (noun)	appearing (noun)
the act of appearing in public view	formal attendance (in court or at a hearing) of a party in an action
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