general terms:

morin: mortelum-in-nature (ex: moringender)

mortemp: a mortelum gender. derived from 'mortem' (meaning death) and 'temporalis' (referring to time)

morteline: having mortelum qualities. noun form is mortelinity.

transmorteline, transmortel, transmort: transitioning towards mortelinity

temorlic: mortelum gender alignment.

referential language:

tal: a mortelum person. derived from 'mortal(ity)' and 'fatality'

pire: a younger mortelum person. derived from 'expire' in the sense of 'die'

whil: an older mortelum person. derived from 'whilom', which can mean 'at some time in the past' or 'dead'