safekeeping vs guardianship

safekeeping and guardianship both are nouns.

Word	Noun	Adjective	Verb	Adverb
safekeeping	Yes	No	No	No
guardianship	Yes	No	No	No

As nouns, safekeeping and guardianship are synonyms defined as:

safekeeping and guardianship: the responsibility of a guardian or keeper

Other synonyms of safekeeping include keeping.

safekeeping (noun)	guardianship (noun)
the responsibility of a guardian or keeper	the responsibility of a guardian or keeper
	attention and management implying responsibility for safety