The word "hush-hushing" is typically used to describe a sound or action meant to quiet someone or something down. However, there are many other synonyms that can be used in its place to convey a similar meaning. Some examples include "shushing," "quieting," "silencing," "stillness," "muffling," "muzzling," and "calming." Each of these words can be used in different contexts to describe similar actions or situations in which there is a need for quiet or calm. Ultimately, choosing the right synonym depends on the exact context and intended meaning of the sentence or phrase in which it is used.