There are plenty of synonyms for the phrase "a short time" that can be used to describe a brief period. Some examples include "briefly," "momentarily," "temporarily," "fleetingly," "transiently," "intermittently," "for a spell," "for a moment," and "for a little bit." These synonyms can be used to convey the idea of something that is brief, quick, or fleeting. They can be employed in a variety of contexts, including in everyday conversation, in writing, or in formal settings such as business or academic presentations. Choosing the right synonym will depend on the context and the intended tone of the message being conveyed.