syllabary vs syllabic script

syllabary and syllabic script both are nouns.

Word	Noun	Adjective	Verb	Adverb
syllabary	Yes	No	No	No
syllabic script	Yes	No	No	No

As nouns, syllabary and syllabic script are synonyms defined as:

syllabary and syllabic script: a writing system whose characters represent syllables

syllabary (noun)	syllabic script (noun)
a writing system whose characters represent syllables	a writing system whose characters represent syllables