boustrophedon vs writing system

boustrophedon and writing system both are nouns.

Word	Noun	Adjective	Verb	Adverb
boustrophedon	Yes	No	No	No
writing system	Yes	No	No	No

As nouns, writing system is a hypernym of boustrophedon; that is, writing system is a word with a broader meaning than boustrophedon:

boustrophedon: an ancient writing system: having alternate lines written in opposite directions; literally `as the ox ploughs'
writing system: a method of representing the sounds of a language by written or printed symbols

Other hypernyms of boustrophedon include orthography.

boustrophedon (noun)	writing system (noun)
an ancient writing system: having alternate lines written in opposite directions; literally `as the ox ploughs'	a method of representing the sounds of a language by written or printed symbols