filiform vs threadlike

filiform and threadlike both are adjectives.

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

As adjectives, filiform and threadlike are synonyms defined as:

Other synonyms of filiform include filamentlike, filamentous, thready.

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