write up vs exclusive

write up and exclusive both are nouns.

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

As nouns, exclusive is a hyponym of write up; that is, exclusive is a word with a more specific, narrower meaning than write up:

Other hyponyms of write up include newsletter, newssheet, bulletin, communique, despatch, dispatch, urban legend, scoop.

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

write up (adjective)	exclusive (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

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