self-examination vs introspection

self-examination and introspection both are nouns.

Word	Noun	Adjective	Verb	Adverb
self-examination	Yes	No	No	No
introspection	Yes	No	No	No

As nouns, self-examination and introspection are synonyms defined as:

self-examination and introspection: the contemplation of your own thoughts and desires and conduct

Other synonyms of self-examination include self-contemplation.

self-examination (noun)	introspection (noun)
the contemplation of your own thoughts and desires and conduct	the contemplation of your own thoughts and desires and conduct