gallbladder vs gall bladder

gallbladder and gall bladder both are nouns.

Word	Noun	Adjective	Verb	Adverb
gallbladder	Yes	No	No	No
gall bladder	Yes	No	No	No

As nouns, gallbladder and gall bladder are synonyms defined as:

gallbladder and gall bladder: a muscular sac attached to the liver that stores bile (secreted by the liver) until it is needed for digestion

gallbladder (noun)	gall bladder (noun)
a muscular sac attached to the liver that stores bile (secreted by the liver) until it is needed for digestion	a muscular sac attached to the liver that stores bile (secreted by the liver) until it is needed for digestion