investigate vs examine

investigate and examine both are verbs.

Word	Noun	Adjective	Verb	Adverb
investigate	No	No	Yes	No
examine	No	No	Yes	No

As verbs, examine is a hypernym of investigate; that is, examine is a word with a broader meaning than investigate:

investigate: investigate scientifically
examine: consider in detail and subject to an analysis in order to discover essential features or meaning

Other hypernyms of investigate include analyse, analyze, canvass, study.

As verbs, examine is a hyponym of investigate; that is, examine is a word with a more specific, narrower meaning than investigate:

Other hyponyms of investigate include explore, research, search, explore, probe, research, experiment.

As verbs, examine is a hypernym of investigate; that is, examine is a word with a broader meaning than investigate:

Other hypernyms of investigate include probe.

investigate (verb)	examine (verb)
investigate scientifically	consider in detail and subject to an analysis in order to discover essential features or meaning
conduct an inquiry or investigation of	question closely
	question or examine thoroughly and closely
	observe, check out, and look over carefully or inspect
	put to the test, as for its quality, or give experimental use to