steal away vs sneak off

steal away and sneak off both are verbs.

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

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

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

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