filamentous vs filiform

filamentous and filiform both are adjectives.

Word	Noun	Adjective	Verb	Adverb
filamentous	No	Yes	No	No
filiform	No	Yes	No	No

As adjectives, filamentous and filiform are synonyms defined as:

Other synonyms of filamentous include filamentlike, threadlike, thready.

filamentous (adjective)	filiform (adjective)
thin in diameter; resembling a thread	thin in diameter; resembling a thread