flying squirrel vs flying phalanger

flying squirrel and flying phalanger both are nouns.

Word	Noun	Adjective	Verb	Adverb
flying squirrel	Yes	No	No	No
flying phalanger	Yes	No	No	No

As nouns, flying squirrel and flying phalanger are synonyms defined as:

flying squirrel and flying phalanger: nocturnal phalangers that move with gliding leaps using parachute-like folds of skin along the sides of the body

Other synonyms of flying squirrel include flying opossum.

flying squirrel (noun)	flying phalanger (noun)
nocturnal phalangers that move with gliding leaps using parachute-like folds of skin along the sides of the body	nocturnal phalangers that move with gliding leaps using parachute-like folds of skin along the sides of the body