xenoaspect - aspects of identity (either self- or society-imposed) that human society does not possess [1] [2]. May be used to describe a category of identity, a specific identity, or an individual possessing said identity. Coined by Tumblr user insectvoid.
xenogender - a category of nonbinary gender identities that go beyond human understandings of gender categorization and hierarchy [3] [4]. Coined in 2014 by Tumblr user Baaphomett.
xenomelia - a syndrome in which a person feels a desire to amputate a healthy body part [5]. Also known as apotemnophilia or body integrity identity disorder (BIID). The healthy body part may cause dysphoria and the thought of removing the part may cause euphoria [6]. Not inherently an alterhuman experience, but may be regarded as such depending on individual preferences.