That is, of course, ignoring the prime root of Nephilim. Which, by the way, you're incorrect on the link you used above by saying it doesn't exist. I merely choose this spelling because it fits our language best. As you know, Hebrew doesn't have vowels. Rest assured that it's there. I have a copy of the Massorah manuscripts courtesy Green's Interlinear. You merely add im to make something plural in the Hebrew.
http://www.eliyah.com/cgi-bin/strongs.cgi?...on&isindex=5303 5303 nphiyl nef-eel' or nphil {nef-eel'}; from [url="http://www.eliyah.com/cgi-bin/strongs.cgi?file=hebrewlexicon&isindex=5307]5307[/url]; properly, a feller, i.e. a bully or tyrant:--giant.
5307 naphal naw-fal' a primitive root; to fall, in a great variety of applications (intransitive or causative, literal or figurative):--be accepted, cast (down, self, (lots), out), cease, die, divide (by lot), (let) fail, (cause to, let, make, ready to) fall (away, down, -en, -ing), fell(-ing), fugitive, have (inheritance), inferior, be judged (by mistake for [url="http://www.eliyah.com/cgi-bin/strongs.cgi?file=hebrewlexicon&isindex=6419]6419[/url]), lay (along), (cause to) lie down, light (down), be (X hast) lost, lying, overthrow, overwhelm, perish, present(-ed, -ing), (make to) rot, slay, smite out, X surely, throw down.They fell from somewhere.
Jude 1:6And the angels which kept not their first estate, but left their own habitation, he hath reserved in everlasting chains under darkness unto the judgment of the great day.