CarrauntoohilA mountain in Macgillycuddy's Reeks, County Kerry, and the highest peak in Ireland.
catboatA sailing boat with a single sail, usually rigged on a gaff spar, used for fishing in New England and later adapted for racing and cruising. It has a single mast set near to the bow and a long boom which may extend over the stern.
clochánAn old dry-stone hut with a corbelled roof, commonly found on the southwest Irish coast.
CloghanA village in the barony of Raphoe South, County Donegal, Ireland (54.8387°N, 7.93774°W).
ClongriffinA community in Donaghmede, County Dublin, Ireland.
clurichaunA mischievous, potentially malicious fairy, akin to the leprechaun, that greatly loves drinking and tends to haunt breweries, pubs and wine cellars.
coarbThe successor to the founder of a religious institution.
colcannonA traditional Irish dish made from mashed potatoes and cabbage or kale, with scallions, butter, salt and pepper added.
currachAn Irish boat, constructed like a coracle, and originally the same shape; now a boat of similar construction but conventional shape and large enough to be operated by up to eight oars.
drisheenA type of Irish sausage made from pigs' blood, suet, and salt; an Irish version of black pudding.
dudeenA short-stemmed Irish pipe made out of clay.
dullahanA black-clad (usually male) horserider in Irish folklore which carries its severed head like a lantern and may be repelled by gold; when it stops riding (or calls out someone's name), someone will die. (Also called the Gan Ceann, Irish for "[one] without a head".)
Dún LaoghaireA town and port in County Dublin, Ireland.