Relic Spear

[Rick]

Up for possible identification; a spear head found on coastal Cape Cod Massachusetts. It's not much to look at now with the point gone and the socket bashed in from being used for some purpose other than martial use.

Length is about 14 inches.
Width 1.75 inches at the widest point.
The socket must have been about 1.75 inches diameter before the end was bashed in.
The blade tapers from 3/8's to less than 1/4 inch at the break; is thicker in the center tapering to an edge that was once pretty sharp.
Weight is 542 gm.
There are the remains of at least two fullers on one side; the other side is so pitted I can't tell whether it had fullers or not.
This thing is very very old. It is not a whaling spear of any known (to me) type.
So, what have we here; a pike head, Viking spear?
Ideas and comments will be much appreciated.

edit
I'm thinking its an American colonial boarding pike that has had the langets repurposed.