Bristlier is an adjective that describes something with rough, prickly hair or fur. There are several synonyms for this word, including spiky, rough, prickly, brambly, and thorny. These words all convey a similar meaning and can be used interchangeably to describe something that is covered in sharp, pointed hair or spikes. Other synonyms for bristlier include shaggy, unkempt, scruffy, and tousled, which describe hair or fur that is messy or untidy. No matter which synonym you choose, they all convey the same rough, coarse texture that is characteristic of bristlier hair or fur.