croak vs croaking

croak and croaking both are nouns.

Word	Noun	Adjective	Verb	Adverb
croak	Yes	No	Yes	No
croaking	Yes	No	No	No

As nouns, croak and croaking are synonyms defined as:

croak (noun)	croaking (noun)
a harsh hoarse utterance (as of a frog)	a harsh hoarse utterance (as of a frog)

croak (verb)	croaking (verb)
pass from physical life and lose all bodily attributes and functions necessary to sustain life
make complaining remarks or noises under one's breath
utter a hoarse sound, like a raven