harsh on vs criticize

harsh on and criticize both are verbs.

Word	Noun	Adjective	Verb	Adverb
harsh on	No	No	Yes	No
criticize	No	No	Yes	No

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

harsh on: criticize harshly
criticize: find fault with; express criticism of; point out real or perceived flaws

Other hypernyms of harsh on include criticise, knock, pick apart.

harsh on (verb)	criticize (verb)
criticize harshly	find fault with; express criticism of; point out real or perceived flaws
	act as a critic