chromatid vs filament

chromatid and filament both are nouns.

Word	Noun	Adjective	Verb	Adverb
chromatid	Yes	No	No	No
filament	Yes	No	No	No

As nouns, filament is a hypernym of chromatid; that is, filament is a word with a broader meaning than chromatid:

chromatid: one of two identical strands into which a chromosome splits during mitosis
filament: a very slender natural or synthetic fiber

Other hypernyms of chromatid include fibril, strand.

chromatid (noun)	filament (noun)
one of two identical strands into which a chromosome splits during mitosis	a thin wire (usually tungsten) that is heated white hot by the passage of an electric current
	a threadlike structure (as a chainlike series of cells)
	the stalk of a stamen
	a very slender natural or synthetic fiber