affixation vs formation

affixation and formation both are nouns.

Word	Noun	Adjective	Verb	Adverb
affixation	Yes	No	No	No
formation	Yes	No	No	No

As nouns, formation is a hypernym of affixation; that is, formation is a word with a broader meaning than affixation:

affixation (noun)	formation (noun)
formation of a word by means of an affix	the act of fabricating something in a particular shape
the act of attaching or affixing something	the act of forming or establishing something
the result of adding an affix to a root word	creation by mental activity
	a particular spatial arrangement
	an arrangement of people or things acting as a unit
	(geology) the geological features of the earth
	natural process that causes something to form