siss vs verbalize

siss and verbalize both are verbs.

Word	Noun	Adjective	Verb	Adverb
siss	No	No	Yes	No
verbalize	No	No	Yes	No

As verbs, verbalize is a hypernym of siss; that is, verbalize is a word with a broader meaning than siss:

Other hypernyms of siss include mouth, speak, talk, utter, verbalise.

siss (verb)	verbalize (verb)
make a sharp hissing sound, as if to show disapproval	convert into a verb
express or utter with a hiss	express in speech
	be verbose
	articulate; either verbally or with a cry, shout, or noise