groupthink vs decision making

groupthink and decision making both are nouns.

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

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

groupthink: decision making by a group (especially in a manner that discourages creativity or individual responsibility)
decision making: the cognitive process of reaching a decision

Other hypernyms of groupthink include deciding.

groupthink (noun)	decision making (noun)
decision making by a group (especially in a manner that discourages creativity or individual responsibility)	the cognitive process of reaching a decision