affair vs thing

affair and thing both are nouns.

Word	Noun	Adjective	Verb	Adverb
affair	Yes	No	No	No
thing	Yes	No	No	No

As nouns, affair and thing are synonyms defined as:

Other synonyms of affair include matter.

affair (noun)	thing (noun)
a vaguely specified concern	a separate and self-contained entity
a formal or official social gathering or ceremony of people	an action
a usually secretive or illicit sexual relationship	an artifact
	an entity that is not named specifically
	any attribute or quality considered as having its own existence
	a special abstraction
	a special objective
	a vaguely specified concern
	a statement regarded as an object
	an event
	a persistent illogical feeling of desire or aversion
	a special situation