A subdivision of the Green Lantern Corps, the Alpha Lanterns serve as the Guardians' Internal Affairs officers and are powerful shock-troopers.

Savage Land Protectors

The Alpha Primitives are an enslaved race, born and bred to serve the Inhumans. They would eventually rebel against their masters and battle the Inhumans.

Junior team of mutants mentored by Northstar and Karma prior to the events of Decimation.

Vindicator's new team.

Shortly after becoming the director of S.H.I.E.L.D., Tony Stark formed a special, four-man team dubbed 'Alpha Team', and produced suits of highly advanced armor based on his own Iron Man suit.

Alstair is a planet in the Antares solar system; it's populated by Alstaireans, a matriarchal race of plant elementals. Currently, their matriarch is Queen Hyathis. In the ancient past, their first queen was named Calleen; she was one of the first seven Green Lanterns.

An international multibillion dollar corporation raised and patented by it's namesake creator Edwin Alva. A great many minds commingle within, creating a litany of groundbreaking properties ranging from advanced tech to chemical and biomechanical facilities. Much of which acting as a front for the C.E.O's more clandestine escapades.

An alliance of hundreds of worlds set on creating a Utopian society

Amatsu-Kami is the pantheon of Japanese gods.

Team consisting of Spider-Man, Iceman and Firestar. Though the group has only had a handful of comic book appearances, the trio had their own popular animated series in the 1980's. The Ultimate Universe version consists of Spider-Man, Iceman and the Human Torch instead of Firestar at first, but she later joined.

The Amazons were created by Hippolyta, the daughter of the Olympian god of war, Ares.

Better known as the Amazons, they are a group of immortal warrior women created by the Olympian Gods. The most well-known is Princess Diana, also known as Wonder Woman.

They live in the Otherworld, at the Foul Courts.

In the Impact universe, the American Cursaders were the heroes who preceded the 90s Crusaders.

American Freedom Front is a terrorist group.

Enemies of Spider-Girl Anya Corazon.

A new species of vampire, the American Vampires thrive in sunlight but remain very few in number.

America's Best is the name of a fictional team of "science heroes" from America's Best Comics (hence their name). The team is comprised of heroes whose individual adventures feature in other books.

The Avengers of an alternate world where Captain America was never discovered thawed in ice.

A private law enforcement agency dedicated to fighting America's War on Crime.

AmerTek Industries is a military industrial firm that employed engineer Dr. John Henry Irons (Steel). The company would later become a recurring enemy for Steel after he discovers them selling their weapons to gangs.

Amnesty Bay Police Department is the police force of Amnesty Bay in the state of Maine.

The Anachronauts are the greatest warriors of their time periods, gathered by Kang to protect his citadel in Chronopolis.

Scientists of the Insect Mesh. They're responsible for creation of the Plague of Tedious Dreams, the Silence Plague and the Space Plague.

The Anchorite Sect are a group of vampires that are peaceful and prefer to isolate themselves away from humanity.

The Ancient Ones knew chaos and order.

A group of Lemurian telepaths who rebelled against Naga and stole the Serpent Crown. They then relocated to Antarctica where they established a new Kingdom and used chemicals to transform themselves into human form.

A-Next is the MC2 Universe version of the Avengers and consists of the sons, daughters, and proteges of the previous generation of heroes.

Seraphic Council.

Brought together by the vampire with a soul, Angel, this group of vampire and demon hunters is dedicated to "Helping the Helpless".

Group of three kids with superhuman powers. They're evil.

Angels are mythical beings that have the divine ability to fly. Are often called messengers of God in Abrahamic religions and live in the heavens. They are usually depicted in human form as male, female, or genderless (depending on the artist's/writer's interpretation).

A group of religious zealots, manipulated by Ra's al Ghul.

A cadre of ethereal, winged warriors who serve the Primal Force of Light that is also know as The Angelus.

A group of birds that like to destroy structures built by pigs.

Group of people who were awarded the power to create animals.

They are the Animal Men of Earth-AD.

Animates are artificial humanoid constructs from Apokolips that serve the New God Dr Bedlam.

Experiments, who Ani-Mator was working on.