feel out vs sound out

feel out and sound out both are verbs.

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

As verbs, feel out and sound out are synonyms defined as:

Other synonyms of feel out include check out.

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