syllabicity vs language system

syllabicity and language system both are nouns.

Word	Noun	Adjective	Verb	Adverb
syllabicity	Yes	No	No	No
language system	Yes	No	No	No

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

syllabicity: the pattern of syllable formation in a particular language
language system: a system of linguistic units or elements used in a particular language

syllabicity (noun)	language system (noun)
the pattern of syllable formation in a particular language	a system of linguistic units or elements used in a particular language