I believe that all fallen angels are demons. And throughout scripture we get a sense of rank in both the elect and fallen angels. And Lots of different words to describe these angels.
1 Thessalonians 4:16 (NASB95)
16 For the Lord Himself will descend from heaven with a shout, with the voice of
the archangel and with the trumpet of God, and the dead in Christ will rise first.
We have the prefix Arch which means that there is a rank or priority position in play here.
1... Beni(e) ha Elohim, “sons of God”......This one gets people fired up Huh?! 2..
Malak , “angel, messenger, ambassador” 3... Cherub, “cherub, an
order of angelic beings, four-winged angels, 4.... Seraphim , “an order of
angelic beings, six-winged angels” 5... Boqer kokab, “morning stars” 6... Ruach,
“spirit” (
Nm. 11:25;
1 Sm. 16:14;
Is. 11:2). 7... Tsava , “host, army.” 8...
Qadhosh (adjective), “holy ones.” 9... Angelos , “angel, messenger, envoy”
10.... Pneuma , “spirit.” 11.... Satan, “Satan” 12... Halel Ben Shachar,
“son of the dawn, morning star” 13... Diabolos , “the adversary, the
devil, slanderous, false accuser” 14... Archangelos , “archangel” 15... Arche
, “authority, rule, domain, principality” 16... Exousia , “authority,
right, power” 17.... Kosmokrator, “world ruler” 18... Ta pneumatikos tes
ponerias en tois epouraniois, “wicked spirit-beings in the heavenlies”
I think one scripture in particular puts it into perspective
for us that demons are in fact fallen angels.
Matthew 25:41 (NASB95)
41 “Then He will also say to those on His left, ‘Depart from Me, accursed ones, into the eternal fire which has been prepared for the devil and his angels;