All words are names of the qualities of Malchut; this is the only thing we read about in Kabbalah books. You might object because the letters originate in the following way: nine come from ZAT de Bina, nine come from Zeir Anpin, and just the last four letters of the alphabet are contained in Malchut . So why do all the words come from Malchut? It’s because we receive everything as an imprint in Malchut, no matter where it comes from.
Every name is the will to enjoy through the action of bestowal, meaning through reception for the sake of bestowal. The intention to bestow is what gives the desire a specific form. We don’t name the desire and the Light themselves, but their connection, the relationship between desire and Light. Only it has a name.
For example, a “plant” is not just a desire to enjoy, but a desire that contains the force of the Light that forms it into a plant, which is a desire of the vegetative type. The original Kli HaVaYaH is not yet a name, but just its basis. Names are fulfillments that are contained inside this name, or the Lights that can clothe inside this matter according to equivalence of form. This is why all the names come from Malchut.
From the 2nd part of the Daily Kabbalah Lesson 5/4/10, Beit Shaar HaKavanot
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Preface to the Wisdom of Kabbalah: “Taamim, Nekudot, Tagin, and Otiot”