Thank you for sharing photos of this interesting sword. I find these mysterious inscriptions a fascinating puzzle. While it is true that in most cases we will likely never explain their meaning with any confidence, I think there are many interesting comparisons that can be made on the basis of the content and style of their text.
I think your sword can be compared to several other well-known and/or published examples. Firstly the hilt is very similar to both the River Witham sword (as already noted by Peter Hudson) and the Whittlesea Mere sword.
The last four letters in the inscription might be NEDA, which are the first four letters in one of the Whittlesea Mere inscriptions. This would put it in the "NED" group of inscriptions, which I think is traditionally interpreted as
nomine eterni Dei. the additional A could be
amen; the narrow, concave shape of this letter can be seen on some other swords. The fact that the four letters can occur as a block at both the beginning or ending of an inscription suggests that they represent an independent, coherent invocatory phrase/fragment.
In nomine eterni Dei, amen can be found as a preamble invocation in medieval documents, as seen here:
https://books.google.ca/books?id=AeD...20amen&f=false
The preceding letter which is mostly erased is probably a peculiar uncial version of the letter T, as found in some other sword inscriptions. It has the shape mostly of a letter C, connected to the head-stroke of T, sometimes very small and narrow as seen here.
Once I've had time to review my files, I may be able to offer more observations on the rest of the inscription. I would be very interested to see additional photos, even of the illegible side.
Best regards,
Mark