There aren’t a lot of Irish words in English, but there are some. See for instance, slew and slogan.
Boycott is another irish word which has entered the english vocabulary.
Excellent blog btw. very interesting posts
Thomas Kinsella. Translator.The Tain: Translated from the Irish Epic Tain Bo Cuailnge.Oxford University Press. ISBN13: 9780192803733.
Barry Cunliffe. The Ancient Celts. OUP, 1997.