sneak away vs steal away

sneak away and steal away both are verbs.

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

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

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

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