formation vs affixation

formation and affixation both are nouns.

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

As nouns, affixation is a hyponym of formation; that is, affixation is a word with a more specific, narrower meaning than formation:

formation (noun)	affixation (noun)
the act of fabricating something in a particular shape	formation of a word by means of an affix
the act of forming or establishing something	the act of attaching or affixing something
creation by mental activity	the result of adding an affix to a root word
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