"croak" in the noun sense
1. croak, croaking
a harsh hoarse utterance (as of a frog)
"croak" in the verb sense
1. die, decease, perish, go, exit, pass away, expire, pass, kick the bucket, cash in one's chips, buy the farm, conk, give-up the ghost, drop dead, pop off, choke, croak, snuff it
pass from physical life and lose all bodily attributes and functions necessary to sustain life
"She died from cancer"
"The children perished in the fire"
"The patient went peacefully"
"The old guy kicked the bucket at the age of 102"
2. croak, cronk
utter a hoarse sound, like a raven
3. murmur, mutter, grumble, croak, gnarl
make complaining remarks or noises under one's breath
"she grumbles when she feels overworked"
Source: WordNet® (An amazing lexical database of English)
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