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. rare
• 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 rare
Lexicophilia 