morale building vs morale builder

morale building and morale builder both are nouns.

Word	Noun	Adjective	Verb	Adverb
morale building	Yes	No	No	No
morale builder	Yes	No	No	No

As nouns, morale building and morale builder are synonyms defined as:

morale building and morale builder: anything that serves to increase morale

Other synonyms of morale building include morale booster.

morale building (noun)	morale builder (noun)
anything that serves to increase morale	anything that serves to increase morale
	something or someone who influences by building or strengthening morale