think up vs fabricate

think up and fabricate both are verbs.

Word	Noun	Adjective	Verb	Adverb
think up	No	No	Yes	No
fabricate	No	No	Yes	No

As verbs, fabricate is a hyponym of think up; that is, fabricate is a word with a more specific, narrower meaning than think up:

Other hyponyms of think up include idealise, idealize, cook up, invent, make up, manufacture.

think up (verb)	fabricate (verb)
devise or invent	concoct something artificial or untrue
	put together out of artificial or natural components or parts