Good Friday is the crucification of Christ. Christmas is the Nativity of Christ. Pascha is the Resurrection of Christ or the True Passover.
The word "Easter" is actually a word rooted in the name either of an alleged Teutonic goddess (Eostre) or, more probably, from the name "Eostur" meaning the "season of rising" and indicating springtime.
It is only used in the English language.
It came into use because the month of April was known in Anglo-Saxon countries as easter-monadh, and Eastur became an old Germanic word meaning springtime.
Other languages have different names for Easter -- "Pascha/Πάσχα" (Latin and Greek), "Pasqua" (Italian), "Pascua" (Spanish), "Paschen" (Dutch), "Pasg" (Welsh), etc. -- all of which derives from the Hebrew word פסח ("Pesach") meaning "Passover."
The point is that the claim that "Easter is a pagan holiday" because of the word "Easter" is ridiculous. The English word for it might have pagan origins deriving from Eostre and/or the word for springtime, but the Solemnity is rooted in the Old Testament Pesach which was fulfilled at the Crucifixion which gave us the fruits of the Resurrection.
In addition, all the names for the days of the week are "pagan" in origin, too. Sunday is named for the Sun; Monday for the Moon; Tuesday for god Tiu, Wednesday for Woden, Thursday for Thor, Friday for Freya, and Saturday for Saturn, so anyone who balks at celebrating "Easter" because of its "pagan origins" had better not refer to the days of the week by their English names.