More capillaceous refers to something that has a hair-like or thread-like appearance, such as thin plant stems or fine spider webs. Synonyms for the term 'more capillaceous' could include 'hair-like', 'filamentous', 'thread-like', 'wispy', 'delicate', 'fine', 'slender' or 'fragile'. These words all describe similar characteristics of something that is thin or delicate, and can be used interchangeably depending on the context. When describing a plant or animal structure, using synonyms can help to add variety to your writing and make it more interesting to read.