segment vs syllabicate

segment is a noun but syllabicate is not a noun.

Word	Noun	Adjective	Verb	Adverb
segment	Yes	No	Yes	No
syllabicate	No	No	Yes	No

As verbs, syllabicate is a hyponym of segment; that is, syllabicate is a word with a more specific, narrower meaning than segment:

Other hyponyms of segment include syllabify, syllabise, syllabize, quarter.

segment (noun)	syllabicate (noun)
one of several parts or pieces that fit with others to constitute a whole object
one of the parts into which something naturally divides

segment (verb)	syllabicate (verb)
divide into segments	divide into syllables
divide or split up