This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. Plural form of cuckoo.

"I am deliberately avoiding bringing in cuckoos and accipitrids (the latter noted by Olson as being possible allies of the turacos) in order to keep things simple-ish."

cuckoo spittle   

cuckooed    cuckooing    cuckoos   

repeat    echo    saphead    sap    tomfool    fool    muggins   

hornbill cuckoo    bee cuckoo    cuckoo owl   

cuckoo sign    cuckoo's egg    cuckoo shrike    cuckoo dove    cloud-cuckoo-land    cuculine    cuckoo clock   

magpie    sparrow    blackbird    jay    lark    dove    quail    nightingale    thrush    parrot