slip out vs sneak away

slip out and sneak away both are verbs.

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

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

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

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