palatalise vs sound out

palatalise and sound out both are verbs.

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

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

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

palatalise (verb)	sound out (verb)
pronounce a consonant with the tongue against the palate	try to learn someone's opinions and intentions
	speak, pronounce, or utter in a certain way