The Bible uses other names to describe these abominations and their descendents in addition to the word Nephilim, they are. . . .
Raphiam- from the root word rafa=(spirits) Gen. 14:5 Anikim- the prideful ones, Num. 13;28-33, Emim- the proud deserters, Gen. 14:5 Zuzim- the evil ones Num. 14:5 Zamzuzamim- the evil plotters, Deut. 2:20 Zophim- the watchers, Dan. 4:17 Num. 23, The Sepherim- the many. . . . Other names anunnaki,watchers,fallen angels.
Aliens in the bible (34) www.openbible.info/topics/aliens?