lash out vs criticize

lash out and criticize both are verbs.

Word	Noun	Adjective	Verb	Adverb
lash out	No	No	Yes	No
criticize	No	No	Yes	No

As verbs, criticize is a hypernym of lash out; that is, criticize is a word with a broader meaning than lash out:

lash out: attack in speech or writing
criticize: find fault with; express criticism of; point out real or perceived flaws

Other hypernyms of lash out include criticise, knock, pick apart.

lash out (verb)	criticize (verb)
attack in speech or writing	find fault with; express criticism of; point out real or perceived flaws
	act as a critic