steal away vs sneak away

steal away and sneak away both are verbs.

Word	Noun	Adjective	Verb	Adverb
steal away	No	No	Yes	No
sneak away	No	No	Yes	No

As verbs, steal away and sneak away are synonyms defined as:

Other synonyms of steal away include slip away, slip out, sneak off, sneak out.

steal away (verb)	sneak away (verb)
leave furtively and stealthily	leave furtively and stealthily