pass on vs slip away

pass on and slip away both are verbs.

Word	Noun	Adjective	Verb	Adverb
pass on	No	No	Yes	No
slip away	No	No	Yes	No

As verbs, slip away is a hyponym of pass on; that is, slip away is a word with a more specific, narrower meaning than pass on:

pass on (verb)	slip away (verb)
transmit information	for time to move forward
cause to be distributed	leave furtively and stealthily
move forward, also in the metaphorical sense
give to or transfer possession of
place into the hands or custody of
transmit (knowledge or skills)
refer to another person for decision or judgment