When it comes to describing the act of providing or equipping someone or something with something, there are several synonyms for the phrase "furnish with." Some of the most commonly used phrases include "supply with," "equip with," "outfit with," "provide with," and "furnish with." Each of these phrases can be used to describe the same basic action of providing or equipping with something, but they each carry slightly different connotations and nuances. Depending on the context and the tone of the language being used, different phrases may be more appropriate or effective at conveying the desired meaning.