Nugent Technologies, founded by Alice Nugent, specializes in telecommunications. Control of Nugent Technologies was usurped by Ultron.

The NuHumans are a group of humans with Inhuman DNA. They were revealed to have Inhuman DNA when the T-Cloud transformed them.

Partners Null (Solomon Baxter) and Void (Peter McBride) are able to cancel out light, sound and teleportation.

Robots created by the Kree centuries past to punish those who transgress against the Empire.

Group set on get revenge on the Numen creature for destroying their civilizations.

Beezer: Six Numskulls control an unnamed man who lives with his Aunt. Beano: The five Numskulls, Brainy, Blinky, Radar, Snitch and Cruncher all live inside Edd Case's head and can control his every move. Dandy: Alex Bonce and his family all have their own wacky Numskulls.

Alien race.

A nymph is a female nature spirit in greek mythology

An alien race from the planet Nyrvn in the pre-Crisis universe.

A group of teenage mutants living in District X in New York City.

An offshoot of the Heliopic Brotherhood of Ra. Abe Sapien was a member in his life as Langdon Caul

The Oblivion Front is a terrorist group led by Dominion.

A group of lesser known heroes gathered by Scott Lobdell to fight injustice.

New York is a nexus, a center for all sorts of Ceteri (Supernatural characters) The O.C.T. take care of the crimes. It was created by actress Rosario Dawson, writer David Atchison and illustrator Tony Shasteen; and published by 12 Guage Comics.

The Octessence is a group of eight extra-dimensional beings that 1,000 years ago argued over who was the best. In order to learn the truth of the matter the Exemplars came into being and Cyttorak won.

They are a duo of private investigator's.

A clandestine A.R.G.U.S. unit dedicated to investigating superhuman and supernatural occurrences and determining how to handle such situations.

Russian gangsters located in Gotham City. They run illegal business with drugs and diamonds.

The Justice League Odyssey is a team formed to bring order to the new space sector known as the Ghost Sector.

The Offenders were assembled from various points in time by The Collector to face off against The Grandmaster's time-displaced Defenders as part of a bet made by the two Elders of the Universe. The Offenders were led by Red Hulk.

The O-Force was a celebrity mutant group, whose exploits where made into a reality series. They where the counterpart to the X-statix team, untill many members died during a mission.

The offspring of the Ogdru Jahad.

O.G.R.E. (Organization for General Revenge and Enslavement) is a subversive organization faced by Aquaman and Mera during the 1960s.

Mythological creatures from European folklore.

The race of celestial beings who preceded the New Gods, and ruled the Third World.

The Gods of the planet Zenn-La refers to the collective group of celestial beings that watched over Zenn-La. Like the gods of Earth, they were divided into several groups and belief systems.

Retired superheroes and sidekicks were recruited in response to the increasing number of teenage superheroes. Their goal was to not allow teenage superheroes to come to harm, mostly Young Justice.

An ancient race of powerful pure-breed demons who ruled the Earth during the Primordium Age.

Thanagarian Marauder group.

Enemies of Hercules

OMACs (Observational Metahuman Activity Construct/Omni Mind And Community) are cyborg sleeper agents controlled by Brother Eye.

Omega Core are guards stationed at the pan-galactic prison Kyln.

Omega Flight is a Canadian superhero team and follow up to Alpha Flight.

Formed and lead by Kid Omega, the Omega Gang was a group of Charles Xavier's students that questioned Xavier's philosophy and school policies. They are most known for leading a riot at the Mansion.

A group of freedom fighters from the Vega System who oppose the tyrannical rule of the Citadel.

A team of superheroes set up by the government

Omega Team is a special MI-6 squad lead by Morgan Spetz.

Four cosmic entities awakened by the breach of the Source Wall. They feed on the energy of galaxies and are large enough to crush Earth in a fist.

Company which develops new technologies.