Is there a difference between demons and devils? Unfortunately some English translations in the past have translated the Greek word for "demons" as "devils." This has led to much confusion. There are many demons, but there is only one Devil.
Only One Devil
The word translated Devil is the Greek
diabolos, which means "slanderer." It is always used in the singular when referring to the Devil. The adjectival form of the word
diabolos is used three times in the New Testament and is translated "slanderer" or "false accuser."
Women likewise must be serious, not slanderers, but temperate, faithful in all things (1 Timothy 3:11).
inhuman, implacable, slanderers, profligates, brutes, haters of good (2 Timothy 3:3).
Likewise, tell the older women to be reverent in behavior, not to be slanderers or slaves to drink; they are to teach what is good (Titus 2:3).
Demons
The word translated "demon" comes from the Greek word
daimon, or the diminutive form
daimonion, The root meaning of the Greek word
daimon is "knowing" or "intelligence." This may have the idea that their intelligence is above humans.
Never Interchangeable
It is important to note that
daimon and
daimonion are used in the New Testament in both the singular and the plural (demon and demons), but they are never used interchangeably with
diabolos (Devil). There is only one Devil.
Summary
The Bible says that demons do exist. There are many of them. This is in contrast to the one Devil. Since the root meaning of the Greek word translated as demons means "knowing," there is the possibility that it reflects creatures with higher intelligence than humanity. This, however, is only conjecture.