ordinary care vs guardianship

ordinary care and guardianship both are nouns.

Word	Noun	Adjective	Verb	Adverb
ordinary care	Yes	No	No	No
guardianship	Yes	No	No	No

As nouns, guardianship is a hypernym of ordinary care; that is, guardianship is a word with a broader meaning than ordinary care:

ordinary care: the care that a reasonable man would exercise under the circumstances; the standard for determining legal duty
guardianship: attention and management implying responsibility for safety

Other hypernyms of ordinary care include care, charge, tutelage.

ordinary care (noun)	guardianship (noun)
the care that a reasonable man would exercise under the circumstances; the standard for determining legal duty	the responsibility of a guardian or keeper
	attention and management implying responsibility for safety