Halakha requires that secondary rules be placed around the primary law, to reduce the chance that the main law will be broken. As such, it is common Jewish practice to restrict the use of the word Adonai to prayer only. In conversation, many Jewish people, even when not speaking Hebrew, will call God “Hashem“, השם, which is Hebrew for “the Name” (this appears in Leviticus 24:11).

Many Jews extend this prohibition to some of the other names  and will add additional sounds to alter the pronunciation of a name when using it outside of a liturgical context, such as replacing the ‘h’ with a ‘k’ in names of God such as ‘kel’ and ‘elokim’.

 

While other names of God in Judaism are generally restricted to use in a liturgical context, Hashem is used in more casual circumstances.

Hashem is used by Orthodox Jews so as to avoid saying Adonai outside of a ritual context. For example, when some Orthodox Jews make audio recordings of prayer services, they generally substitute Hashem for Adonai; others will say Amonai. On some occasions, similar sounds are used for authenticity, as in the movie Ushpizin, where Abonai Elokenu  is used throughout.