Beast-burden is a term that connotes a heavy or overwhelming weight or responsibility. In order to expand our vocabulary and add variety to our writing, it's important to familiarize ourselves with synonyms for this phrase. Some possible synonyms for beast-burden include: heavy load, onus, responsibility, weight, burden, encumbrance, millstone, obligation, and yoke. These words can be used interchangeably to convey a sense of obligation or responsibility that is burdensome or difficult to manage. By utilizing different synonyms for beast-burden, we can create more interesting and nuanced language that can better capture the nuances of complex emotions and experiences.