armed vs armed services

armed is not a noun while armed services is a noun.

Word	Noun	Adjective	Verb	Adverb
armed	No	Yes	No	No
armed services	Yes	No	No	No

armed (noun)	armed services (noun)
	the military forces of a nation

armed (adjective)	armed services (adjective)
(used of persons or the military) characterized by having or bearing arms
(used of plants and animals) furnished with bristles and thorns
having arms or arms as specified; used especially in combination