As a proper noun fife
is a traditional county of scotland now a unitary authority, situated between the firth of tay and the firth of forth, with landward boundaries to perth and kinross and clackmannanshire.
As a noun nife is
A small shrill pipe, resembling the piccolo flute, used chiefly to accompany the drum in military music
To play this instrument.
* Nife, NiFe
(geology) nickel–iron, especially the material that makes up the core of the Earth