In obsolete terms the difference between nerve and dare
is that
nerve is sinew, tendon while
dare is to lie or crouch down in fear.
In transitive terms the difference between nerve and dare
is that
nerve is to give strength while
dare is to catch (larks) by producing terror through the use of mirrors, scarlet cloth, a hawk, etc., so that they lie still till a net is thrown over them.
As a proper noun DARE is
abbreviation of w:Dictionary of American Regional English|Dictionary of American Regional English|lang=en.