forethought vs planning

forethought and planning both are nouns.

Word	Noun	Adjective	Verb	Adverb
forethought	Yes	No	No	No
planning	Yes	No	No	No

As nouns, planning is a hypernym of forethought; that is, planning is a word with a broader meaning than forethought:

forethought: planning or plotting in advance of acting
planning: the cognitive process of thinking about what you will do in the event of something happening

Other hypernyms of forethought include preparation, provision.

forethought (noun)	planning (noun)
judiciousness in avoiding harm or danger	an act of formulating a program for a definite course of action
planning or plotting in advance of acting	the act or process of drawing up plans or layouts for some project or enterprise
	the cognitive process of thinking about what you will do in the event of something happening