syllabize vs sound out

syllabize and sound out both are verbs.

Word	Noun	Adjective	Verb	Adverb
syllabize	No	No	Yes	No
sound out	No	No	Yes	No

As verbs, sound out is a hypernym of syllabize; that is, sound out is a word with a broader meaning than syllabize:

Other hypernyms of syllabize include articulate, enounce, enunciate, pronounce, say.

syllabize (verb)	sound out (verb)
utter with distinct articulation of each syllable	try to learn someone's opinions and intentions
divide into syllables	speak, pronounce, or utter in a certain way