mispronounce vs sound out

mispronounce and sound out both are verbs.

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

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

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

mispronounce (verb)	sound out (verb)
pronounce a word incorrectly	try to learn someone's opinions and intentions
	speak, pronounce, or utter in a certain way