Croon

Definition:

(v. i.) To make a continuous hollow moan, as cattle do when in pain.
(v. i.) To hum or sing in a low tone; to murmur softly.
(v. t.) To sing in a low tone, as if to one's self; to hum.
(v. t.) To soothe by singing softly.
(n.) A low, continued moan; a murmur.
(n.) A low singing; a plain, artless melody.

Compare croon with other words:

ceroon vs. croon

croon vs. croton

crook vs. croon

croon vs. crown

chime vs. croon

croon vs. crooning

croon vs. sentimental