Here are the words for WINDOW, that Geoff would have nown as a laddie.

eyethurls - (thurl is old English for hole or gap) - was disappearing from use, having been the only English word for window since the 9th century 

fenester - (emphasis on the middle syllable) - was the new Middle English fashionable term - it appears in the first known advertisement for a private house (1396)

window - had been around since 1225: It meant "wind eye"

vindauga - is the Old Norse term,  the source for window (it also means "wind eye") and was certainly in use in northern parts until the 20th century (cf Makken "vindigger")

finniter - was the Shropshire / Welsh border word (used in Langland)

See-door - is from Cornwall

ffenestr - is medieval welsh (and very close to modern welsh)

finster - would be what a fenlander would have called it (almost the same as Frisian, methinks)

rampt - is the Midland term (which Shakespeare certainly knew)

rut -  pronounced roo-ut - was from Essex

Geoffrey definitely used Windows and was not a Mac man.