designate vs doom

designate is not a noun while doom is a noun.

Word	Noun	Adjective	Verb	Adverb
designate	No	Yes	Yes	No
doom	Yes	No	Yes	No

As verbs, designate and doom are synonyms defined as:

Other synonyms of designate include destine, fate.

designate (noun)	doom (noun)
	an unpleasant or disastrous destiny

designate (adjective)	doom (adjective)
appointed but not yet installed in office

designate (verb)	doom (verb)
design or destine	pronounce a sentence on (somebody) in a court of law
assign a name or title to	decree or designate beforehand
decree or designate beforehand	make certain of the failure or destruction of
indicate a place, direction, person, or thing; either spatially or figuratively
give an assignment to (a person) to a post, or assign a task to (a person)