due care vs ordinary care

due care and ordinary care both are nouns.

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

As nouns, due care and ordinary care are synonyms defined as:

due care and ordinary care: the care that a reasonable man would exercise under the circumstances; the standard for determining legal duty

Other synonyms of due care include reasonable care.

due care (noun)	ordinary care (noun)
the care that a reasonable man would exercise under the circumstances; the standard for determining legal duty	the care that a reasonable man would exercise under the circumstances; the standard for determining legal duty