plural vs travel expense

plural and travel expense both are nouns.

Word	Noun	Adjective	Verb	Adverb
plural	Yes	Yes	No	No
travel expense	Yes	No	No	No

plural (noun)	travel expense (noun)
the form of a word that is used to denote more than one	(frequently plural) expenses incurred by an employee in the performance of the job and usually reimbursed by the employer

plural (adjective)	travel expense (adjective)
grammatical number category referring to two or more items or units
composed of more than one member, set, or kind