introspect vs think over

introspect and think over both are verbs.

Word	Noun	Adjective	Verb	Adverb
introspect	No	No	Yes	No
think over	No	No	Yes	No

As verbs, think over is a hypernym of introspect; that is, think over is a word with a broader meaning than introspect:

Other hypernyms of introspect include chew over, contemplate, excogitate, meditate, mull, mull over, muse, ponder, reflect, ruminate, speculate.

introspect (verb)	think over (verb)
reflect on one's own thoughts and feelings	reflect deeply on a subject