slip away vs elapse

slip away and elapse both are verbs.

Word	Noun	Adjective	Verb	Adverb
slip away	No	No	Yes	No
elapse	No	No	Yes	No

As verbs, slip away and elapse are synonyms defined as:

Other synonyms of slip away include glide by, go along, go by, lapse, pass, slide by, slip by.

slip away (verb)	elapse (verb)
for time to move forward	for time to move forward
leave furtively and stealthily