Here are some words for Therians or Otherkins. I found these on a website and I don't claim any credit for these definitions.

Note: The purpose of terminology is to describe something very complex briefly. A long explanation about anything is almost always going to be preferable than a single term. Not everyone fits into neat little boxes and categories, and it's not necessary to try and simplify that which we should really be focused on exploring.

Alpha - The first letter of the Greek alphabet, used to designate the highest position in a social group.

Alpha Drive - The drive (or lack of) to be in a certain position in a social grouping.

Alt.horror.werewolves (AHWW) - A Usenet group commonly regarded to be the birthplace of modern (online) therianthropy, founded in 1992.

Animality - The part of human's nature which is in common with other animals

AP - Astral projection, separating yourself from your body and traversing the astral plane.

Awakening - The moment when a person realises their therianthropic nature. Pretty debatable on what point this actually refers to.

Awere - Combination of aware and were. When a person first comes to understand they are an animal in heart/mind/soul.

Black Veil - The 'black veil' is slang for the separation between your social/public life and therianthropic/otherkin communities. Some are completely open, whilst others the opposite.

Blend-a-kin - Insulting term for polytherians or polykin.

Contherian - A therian who does not experience shifts, but instead experiences a permanent combination of their human side and their theriotype. They are not '50:50' or half and half, they simply experience therianthropy on a non-binary level. There is no distinction between human and animal, rather just a whole.

Constellation - A word for a group of therians.

Cladotherianthropy - An individual who's theriotype is not specific and may refer to a whole species, or clade.

Cyberpack - An online therian community that label themselves as such.

Daemien - A person who pratices the philosophical practice of visualizing their inner thoughts as an animal or being, and communicating with them in an internal conversation.

Despertando (Portugese) - A person who is currently awakening or discovering the therian community.

Despertar (Portugese) - Awakening

Empathy - Taking on another's emotions.

Gather - A meetup in the Otherkin community.

Glamour Bomb - When Fae or Otherkin individuals leave signs around about their identity, such as leaving notes inside fantasy books which read 'your wings are real'.

Greymuzzle - An experienced or well known therian. Occasionally used to refer to people who were specifically on AHWW in the '90s.

Howl - A therian gathering (also called a Hiss, Yowl, Meow or Meet depending on the theriotypes present). Howls tend to take the form of camp outs, cabin weekends, or house parties. They have been held in Australia, Canada, Russia, Sweden, the UK and the US, varying between four and over fifty attendees.

Kin - Abbreviation of Otherkin.

Kinfeels (unique to Tumblr) - The state of being emotionally moved in relation to one's identity.

'List - Short for Werelist, a large therian site.

Mate - A mate is the partner of a therian, usage varies.

Mainstreamer - Negative slang for a non-therian.

Monkeyboy - Negative slang for a human, although occasionally teasing.

Misanthropy - An intense dislike of humans/humankind.

M-Flare - Generally interchangeable with a mental shift, occasionally used to indicated an involuntary shift.

MILD - Meditation Induced Lucid Dream.

Mudunca (Portuguese) - Portuguese for shift.

Otherkin - Someone who identifies as non-human.

Otherlimb (unique to tumblr) - A phantom limb experienced by an otherkin.

Pack - Technically, a pack is a group of animals that hunt together. However it is often used to refer to groups of therians that live together as a family unit. Online packs are generally called cyberpacks. Packs are normally small, tight-knit groups, but are also occasionally used to refer to loose groups of therian friends in a specific locality.

Polytherian - A therian with more than one theriotype.

Pokekin - A derogatory term for a member of the therian community who 'collects' theriotypes, labeling every dream and cameo shift as a new theriotype.

Phenotype - (also, wereside) Old terms used for theriotype, not in much use anymore.

Posing - Acting in the character of your theriotype, i.e *wags tail*. Often seen as informal roleplaying.

Suntherian - A Therian who's theriotype is integrated into their baseline personality, however they may still experience M-shifts, unlike Contherians.

Shifting - A temporary change in some way to the individual's theriotype.

Shifting Haze - The mental fuzz surrounding all things non-theriotype which occurs during an intense shift.

Species Dysphoria - the feeling of longing for the theriotype form or habitat, discomfort in own body, dislike of own body.

Teen Wolf - A teenager, normally in USA, who wears a wolf tail, collar etc or identifies as a teen wolf. Tends to be disliked by the therian community due to the image they may give of therians to the general public.

Therian - Short term for therianthrope. A person who identifies on some level and to some degree as a non-human animal. (most commonly spiritually)

Therianthropy - The identification with therian identity, phenomena, culture and community surrounding this.

Therian Temple - A since-dead cult/religion revolving around the idea of therian magic.

Theriotype - The animal a therian identifies with.

Theriomythic -  Someone who self identifies as such; generally a therian with a non-Earth based theriotype such as a dragon, phoenix or gryphon. Pretty much an Otherkin.

Therian Community - The global collection of therians, sometimes referencing the online community only.

Weredar - An internal 'radar' for detecting other therians (Weres).

WILD - Waking Induced Lucid Dream

Yearning - The longing for an otherkin or therian to experience part of their life which they cannot - for instance for wolf therians to have a tail, bird therians to fly, elves to be on their home world.