"More filamentous" refers to a shape or texture that is characterized by long, thin, and thread-like structures. Some synonyms for this description include "stringy," "fibrous," "filiform," "thread-like," "filamentary," "stranded," "spindly," and "whisker-like." These words can be used to describe a variety of objects, from spider webs to textiles to types of bacteria. Using synonyms can help to avoid redundancy and add variety to your writing by allowing you to describe similar concepts in different ways. Whether you're writing a scientific paper or a creative piece, incorporating synonyms like these will help to ensure that your language stays fresh and engaging.