morale builder vs morale building

morale builder and morale building both are nouns.

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

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

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

Other synonyms of morale builder include morale booster.

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