Difference between Regardless and Heedless

REGARDLESS vs HEEDLESS: ADJECTIVE

Not having regard or heed; not looking or attending; heedless; negligent; indifferent; careless.
Not regarded; slighted.
Synonyms Unmindful, inattentive, unobservant, neglectful, unconcerned.
In spite of everything
Without regard to drawbacks

Either, Irrespectively, Matter, Wherever, Whichever, Whatever, Disregardless, Thoughtless, Unheeding, Careless, No matter, Heedless, Disregarding, Irregardless, Irrespective

Insensate, Improvident, Foolhardy, Wanton, Feckless, Oblivious, Unmindful, Unthinking, Deaf, Regardless, Indifferent, Careless, Reckless, Thoughtless, Unheeding

Anyway, Any, Either, Matter, Wherever, Whichever, Whatever, Thoughtless, Unheeding, Careless, No matter, Heedless, Disregarding, Irregardless, Irrespective

Insensate, Improvident, Foolhardy, Wanton, Feckless, Oblivious, Unmindful, Unthinking, Deaf, Regardless, Indifferent, Careless, Reckless, Thoughtless, Unheeding

Regardless of how it went, you can relax.
All items containing any goods, regardless of weight.
Applies to all LED luminaires, regardless of wattage.
But, regardless, this is really all about you.
Regardless, I am still planning to buy it.
LOAC regardless of how the conflict is characterized.
Regardless of what you find in the data, and regardless of what constraints are actually defined, the intent is clear and unambiguous.
Services are available to victims regardless of whether the victim knows the offender and regardless of where and when the assault took place.
Regardless of model or system, evaluations must: Be Annual: Every teacher, regardless of experience, deserves meaningful feedback on their performance on an annual basis.
This requirement applies regardless of the length of time in attendance and regardless of whether credit was earned or is desired.

The first heedless acts of conformity could not then be reversed.
Heedless of the warning, Signum dashes towards him, sword extended.
How can we be so blind, heedless, greedy, and violent?.
But verily, many among mankind are heedless of Our Signs!
Black Guard spearhead continued on heedless of the causalities.
Heedless of this development, Otis Redding achieves another milestone.
Thoughtless, irresponsible, heedless, unconcerned, without thinking, carefree, careless; thoughtlessness.
Heedless of passing time, Cogewea still sat meditating.
She desperately shushed him, heedless of other traffic.
His head convulsed, heedless of stone beneath him.