reminder, a therian is someone who identifies as a non-human animal on any level.
an alterhuman is someone who experiences humanity in a way that most would consider unusual and experiences alternative to being human. an alternative human experience and an alternative to being human. this term is sometimes used as an umbrella term for the community.
(some use alterbeing too, someone who experiences being in a way that most would consider unusual. an alternative being experience.)
a non-human is someone who identifies as non-human on any level. this term is sometimes used as an umbrella term for the community.
an otherkin is someone who identifies as a non-human, usually mythical or fantasy, this term is sometimes used as an umbrella term for the community.
an otherlink is someone who voluntarily identifies as a non-human on any level for any reason. coping, loving, dysphoria, 'heartedness, fun, and much more.
an otherheart is someone who feels a strong connection with anything. usually with feelings of being family or close friends, understanding (which can sometimes overlap with relating), being two sides of the same coin, being a reflection of each other, or being a projection of the 'hearted individual.
anything with "kin" attached (ex: conceptkin, placekin, plantkin, dragonkin) is usually only used for/by otherkin, classifying someones (other)kintype. As in what kind of grouping of otherkin they identify as.
anything with "type" attached (ex: kintype, hearttype, linktype, syntype, kithtype) is usually a more specific classification, like this:
alterhuman (umbrella term) -> therian (sub-label) -> theriotype (sub-label specification, what kind of grouping of therian they identify as) and is mostly used like "____ is my (label)type"