COO
VERBS
► CROO to make the murmuring sound of a dove or pigeon, to coo → 1611 obs.
► CROOD the make the murmuring sound of a dove → a1522 Sc.
► CROOK to coo as a dove → 1586 obs.
► CROOKLE to coo as a pigeon → 1574 obs.
► CROUT to coo as a dove → c1550 Sc.
► CRUCKLE to coo as a pigeon → 1691 obs.
► CROODLE to coo as a dove → a1700 Sc.
► ROOCOOCOO to coo; said of a pigeon or dove → 1922
Lexicophilia 