collision course vs course

collision course and course both are nouns.

Word	Noun	Adjective	Verb	Adverb
collision course	Yes	No	No	No
course	Yes	No	Yes	Yes

As nouns, course is a hypernym of collision course; that is, course is a word with a broader meaning than collision course:

collision course: a course of action (following a given idea) that will lead to conflict if it continues unabated
course: a mode of action

Other hypernyms of collision course include course of action.

As nouns, course is a hypernym of collision course; that is, course is a word with a broader meaning than collision course:

collision course: a course of a moving object that will lead to a collision if it continues unchanged
course: a line or route along which something travels or moves

Other hypernyms of collision course include path, track.

collision course (noun)	course (noun)
a course of action (following a given idea) that will lead to conflict if it continues unabated	a mode of action
a course of a moving object that will lead to a collision if it continues unchanged	education imparted in a series of lessons or meetings
	facility consisting of a circumscribed area of land or water laid out for a sport
	(construction) a layer of masonry
	part of a meal served at one time
	a connected series of events or actions or developments
	a body of students who are taught together
	general line of orientation
	a line or route along which something travels or moves

collision course (adverb)	course (adverb)
	as might be expected