"Nephil" and "Nephilim" in Genesis and Numbers

[Bean]

grammar is fun..

Nephil = Singular
Nephil-im = Plural

Genesis 6:4 "There were giants [H 5303] in the earth in those days; and also after that, when the sons of God came in unto the daughters of men, and they bare to them, the same mighty men which of old, men of renown."

Numbers 13:33 "And there we saw the giants [H 5303], the sons of Anak, of the giants [H 5303]: and we were in our own sight as grasshoppers, and so we were in their sight."

Giants [H 5303] "nĕphiyl" masculine noun
Strong's: "giants, the Nephilim"
Gesenius: "only in pl. m. giants"
From: H 5307 "naphal" primitive root verb
Strong's: "to fall, lie, be cast down, fail"
Gesenius: "to fall"

nephilim
generally "..The plural for male ends with "im"." wikihow

some examples.. cherub and cherubim.. seraph and seraphim..

in error, nephil and nephilim are often interchangeably used for singular and plural..

interestingly, also in error, nephilim is widely used to refer to the Watchers.