syllabicity vs syllabic

syllabicity is a noun but syllabic is not a noun.

Word	Noun	Adjective	Verb	Adverb
syllabicity	Yes	No	No	No
syllabic	No	Yes	No	No

syllabicity (noun)	syllabic (noun)
the pattern of syllable formation in a particular language

syllabicity (adjective)	syllabic (adjective)
	consisting of a syllable or syllables
	(of verse) having lines based on number of syllables rather than on rhythmical arrangement of stresses or quantities
	(of speech sounds) forming the nucleus of a syllable
	consisting of or using a syllabary
	of or relating to syllables