mummify vs shrivel up

mummify and shrivel up both are verbs.

Word	Noun	Adjective	Verb	Adverb
mummify	No	No	Yes	No
shrivel up	No	No	Yes	No

As verbs, shrivel up is a hypernym of mummify; that is, shrivel up is a word with a broader meaning than mummify:

Other hypernyms of mummify include shrink, shrivel, wither.

mummify (verb)	shrivel up (verb)
dry up and shrivel due to complete loss of moisture	wither, as with a loss of moisture
remove the organs and dry out (a dead body) in order to preserve it
preserve while making lifeless