The words we don't have yet are the ones we will need as weapons in the imminent revolution/paradigm shift of mental health.
Some words we already have include (descriptions from wikipedia):
anomie: a "condition in which society provides little moral guidance to individuals"
acedia: "also accidie or accedie /ˈæksᵻdi/, from Latin acedĭa, and this from Greek ἀκηδία, "negligence") is a state of listlessness or torpor, of not caring or not being concerned with one's position or condition in the world. It can lead to a state of being unable to perform one's duties in life. Its spiritual overtones make it related to but arguably distinct from depression. Acedia was originally noted as a problem among monks and other ascetics who maintained a solitary life."
todestrieb: "the death drive (German: Todestrieb) is the drive towards death and self-destruction [...] This concept has been translated as, "opposition between the ego or death instincts and the sexual or life instincts" [...] The death drive opposes Eros, the tendency toward survival, propagation, sex, and other creative, life-producing drives."
weltschmerz: "(from the German, meaning world-pain or world-weariness, pronounced [ˈvɛltʃmɛɐ̯ts]) is a term coined by the German author Jean Paul and denotes the kind of feeling experienced by someone who believes that physical reality can never satisfy the demands of the mind."
joie de vivre: "a French phrase often used in English to express a cheerful enjoyment of life; an exultation of spirit."
ubuntu: "the belief in a universal bond of sharing that connects all humanity"
From the preface of Foucault's "Madness and Civilization": "...modern man no longer communicates with the madman [...] There is no common language: or rather, it no longer exists; the constitution of madness as mental illness, at the end of the eighteenth century, bears witness to a rupture in a dialogue, gives the separation as already enacted, and expels from the memory all those imperfect words, of no fixed syntax, spoken falteringly, in which the exchange between madness and reason was carried out. The language of psychiatry, which is a monologue by reason about madness, could only have come into existence in such a silence."
Emile Durkheim's "Suicide" is a work that touches upon the co-incidence of depression, existential apathy, and repurposed religion as affected by the industrial revolution. Here's a neat animated video by the School of Life: https://youtu.be/z9W0GQvONKc
The gifted (and, sadly, recently late) Mark Fisher's explanation of capitalist realism: "Capitalist realism as I understand it cannot be confined to art or to the quasi-propagandistic way in which advertising functions. It is more like a pervasive atmosphere, conditioning not only the production of culture but also the regulation of work and education, and acting as a kind of invisible barrier constraining thought and action."