care vs ordinary care

care and ordinary care both are nouns.

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

As nouns, ordinary care is a hyponym of care; that is, ordinary care is a word with a more specific, narrower meaning than care:

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

Other hyponyms of care include due care, reasonable care, foster care, great care, providence, slight care.

care (noun)	ordinary care (noun)
activity involved in maintaining something in good working order	the care that a reasonable man would exercise under the circumstances; the standard for determining legal duty
the work of providing treatment for or attending to someone or something
attention and management implying responsibility for safety
judiciousness in avoiding harm or danger
a cause for feeling concern
an anxious feeling

care (verb)	ordinary care (verb)
to hope, to desire or to prefer to have something, or to do something
feel concern or interest
be concerned with
be in charge of, act on, or dispose of
provide care for