segment vs syllabize

segment is a noun but syllabize is not a noun.

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

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

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

segment (noun)	syllabize (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)	syllabize (verb)
divide into segments	utter with distinct articulation of each syllable
divide or split up	divide into syllables