The phrase "be filled with" essentially implies the state of being completely full or overflowing. There are several synonyms for this phrase that can be used interchangeably based on the context, including "brimming with," "stuffed with," "replete with," "teeming with," and "saturated with." These synonyms are often used to describe emotions, thoughts, or physical objects that are completely full or overwhelmed. For example, a person can be "brimming with excitement" or "stuffed with food." Similarly, a book can be "replete with information," or a city can be "teeming with life." Whatever the context, there are numerous synonyms available to convey the same meaning and add variety to your writing or speech.