Jews do not speak or write G-ds name in vain, this includes omitting a letter in the word “G-d,” or using the name that was given “YH-H,” because it was only spoken by the high-priest for sacrificial rites, during Judaism’s temple period. Today, Jews instead elect to use many titles in their rites and prayers; “Hashem,” (meaning “the name”) “Adonai,” (meaning “My Lord”) “Elohim,” (meaning “G-d”) and so forth. This is done out of reverence, love, respect, and honoring the creator, not out of superstition or fear.
Sometimes the title given is masculine, sometimes feminine, and sometimes even androgynous in nature, this is representative of the many aspects of the same being. Just as humans can be wrathful, nurturing, loving, jealous, so can G-d, and the many variations of what it’s called are often reflective of this. There is one G-d and many attributes, there’s one G-d, and many titles, and one G-d with one unspeakable name.
To Jewish people, speaking G-ds name is a sin, it is taking or using Adonai’s name in vain, and since the destruction of the second temple, G-ds name is no longer spoken as there are no high-priests. Since there is no more temple (until the third comes) sacrifice was replaced by prayer, the temple replaced by the synagogue, the priest replaced by the Rabbi, and the name of G-d replaced by titles and other means of expression. So while it may seem as though to an outsider that Hashem or Adonai are names of G-d, this is not true, they are mere expressions to denote G-d and not names.