slip by vs vanish

slip by and vanish both are verbs.

Word	Noun	Adjective	Verb	Adverb
slip by	No	No	Yes	No
vanish	No	No	Yes	No

As verbs, vanish is a hyponym of slip by; that is, vanish is a word with a more specific, narrower meaning than slip by:

Other hyponyms of slip by include fell, fly.

slip by (verb)	vanish (verb)
for time to move forward	get lost, as without warning or explanation
	decrease rapidly and disappear
	cease to exist
	pass away rapidly
	become invisible or unnoticeable