exclusive vs write up

exclusive and write up both are nouns.

Word	Noun	Adjective	Verb	Adverb
exclusive	Yes	Yes	No	No
write up	Yes	No	Yes	No

As nouns, write up is a hypernym of exclusive; that is, write up is a word with a broader meaning than exclusive:

Other hypernyms of exclusive include account, news report, report, story.

exclusive (noun)	write up (noun)
a news report that is reported first by one news organization	a short account of the news

exclusive (adjective)	write up (adjective)
excluding much or all; especially all but a particular group or minority
not divided among or brought to bear on more than one object or objective
not divided or shared with others

exclusive (verb)	write up (verb)
	bring to public notice by writing, with praise or condemnation
	put into writing; write in complete form