Provided herein are synergistic herbicidal compositions containing and methods for controlling undesirable vegetation utilizing (a) a compound of formula (I): or an agriculturally acceptable salt or ester thereof and (b) a cellulose biosynthesis inhibitor, e.g., indaziflam and isoxaben. The methods and compositions described herein provide control of undesirable vegetation, e.g., in direct-seeded, water-seeded and transplanted rice, cereals, wheat, barley, oats, rye, sorghum, corn or maize, sugarcane, sunflower, oilseed rape, canola, sugar beet, soybean, cotton, pineapple, pastures, grasslands, rangelands, fallowland, turf, tree and vine orchards, aquatics, plantation crops, vegetables, industrial vegetation management (IVM) or rights-of-way (ROW).