judging vs decision making

judging and decision making both are nouns.

Word	Noun	Adjective	Verb	Adverb
judging	Yes	No	No	No
decision making	Yes	No	No	No

As nouns, decision making is a hypernym of judging; that is, decision making is a word with a broader meaning than judging:

judging: the cognitive process of reaching a decision or drawing conclusions
decision making: the cognitive process of reaching a decision

Other hypernyms of judging include deciding.

judging (noun)	decision making (noun)
the cognitive process of reaching a decision or drawing conclusions	the cognitive process of reaching a decision