Notwithstanding vs. Regardless: What's the Difference?

Notwithstanding and Regardless Definitions
Notwithstanding
In spite of
The teams played on, notwithstanding the rain.
Regardless
In spite of everything; anyway
Continues to work regardless.
Notwithstanding
All the same; nevertheless
We proceeded, notwithstanding.
Regardless
Heedless; unmindful.
Notwithstanding
In spite of the fact that; although.
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Regardless
Having no regard; heedless; careless.
Notwithstanding
Nevertheless, all the same.
He, notwithstanding, persisted in his inquiries.
Regardless
Despite everything; despite the situation
He did it, regardless.
Notwithstanding
Although; despite; even though.
Regardless
Without attention to warnings or indications of bad consequences.
Tatiana knew the meat had passed its expiry date, but she ate it regardless.
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Notwithstanding
In spite of, despite.
Notwithstanding personal preferences, the school district's rules on the topic govern our decision
Regardless
(proscribed) regardless of; paying no attention to
Tatiana ate the cauliflower regardless its colour.
Notwithstanding
Without prevention, or obstruction from or by; in spite of.
We gentil women beeLoth to displease any wight,Notwithstanding our great right.
Those on whom Christ bestowed miraculous cures were so transported that their gratitude made them, notwithstanding his prohibition, proclaim the wonders he had done.
Regardless
Having no regard; heedless; careless; as, regardless of life, consequences, dignity.
Regardless of the bliss wherein he sat.
Notwithstanding
Nevertheless; however; although; as, I shall go, notwithstanding it rains.
I will surely rend the kingdom from thee, and will give it to thy servant. Notwithstanding, in thy days I will not do it.
They which honor the law as an image of the wisdom of God himself, are, notwithstanding, to know that the same had an end in Christ.
You did wisely and honestly too, notwithstandingShe is the greatest beauty in the parish.
These days were ages to him, notwithstanding that he was basking in the smiles of the pretty Mary.
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Regardless
Not regarded; slighted.
Notwithstanding
Despite anything to the contrary (usually following a concession);
Although I'm a little afraid, however I'd like to try it
While we disliked each other, nevertheless we agreed
He was a stern yet fair master
Granted that it is dangerous, all the same I still want to go
Regardless
(usually followed by `of') without due thought or consideration;
Careless of the consequences
The proverbial grasshopper--thoughtless of tomorrow
Crushing the blooms with regardless tread
Regardless
In spite of everything; without regard to drawbacks;
He carried on regardless of the difficulties