recording vs accession

recording and accession both are nouns.

Word	Noun	Adjective	Verb	Adverb
recording	Yes	No	No	No
accession	Yes	No	Yes	No

recording (noun)	accession (noun)
the act of making a record (especially an audio record)	the act of attaining or gaining access to a new office or right or position (especially the throne)
a signal that encodes something (e.g., picture or sound) that has been recorded	the right to enter
a storage device on which information (sounds or images) have been recorded	agreeing with or consenting to (often unwillingly)
	something added to what you already have
	(civil law) the right to all of that which your property produces whether by growth or improvement
	a process of increasing by addition (as to a collection or group)

recording (verb)	accession (verb)
	make a record of additions to a collection, such as a library