steal away vs sneak out

steal away and sneak out both are verbs.

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

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

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

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