Flagelliform is an adjective that describes anything that looks like a whip or a long, slender, flexible structure. There are several synonyms for flagelliform, including filamentous, wiry, sinuous, cordiform, snaky, slender, lissome, wavy, and serpentine. Each of these words describes the characteristic of being long and flexible, with a shape that can bend or twist. Filamentous is often used to describe something that is hair-like or thread-like, while wiry suggests a strength and resilience to the shape. Sinuous and serpentine describe a curve or twist to the shape, while cordiform suggests a heart or teardrop shape. All of these words can be used interchangeably with flagelliform, depending on the context in which they are used.