Difference between Unnatural and Untoward

UNNATURAL vs UNTOWARD: ADJECTIVE

Not natural; supernatural or artificial.
Stilted, affected, or awkward.
Brutal or unfeeling.
Deviating from a behavioral or social norm.
Not included in nature; artificial.
Not in accordance with what usually occurs in nature.
Distorted and unnatural in shape or size; abnormal and hideous
Speaking or behaving in an artificial way to make an impression
Not natural; contrary, or not conforming, to the order of nature; being without natural traits.
Not occuring in the environment or atmosphere
Going against nature; perverse.
Not in accordance with or determined by nature; contrary to nature
Not normal; not typical or usual or regular or conforming to a norm

Contrary to your interests or welfare
Not in keeping with accepted standards of what is right or proper in polite society
Improper; unseemly.
Unfavorable or adverse.
Froward; perverse.
Awkward; ungraceful.
Unfavourable, adverse, or disadvantageous.
Unruly, troublesome.
Unseemly, improper.
Side effects

Artificial, etc. See factitious.
=Syn. 1-3. Preternatural, etc. See supernatural.
Contrary to nature
Not normal
Not in conformity to nature; not agreeable to the real character of persons or things; not representing nature; forced; strained; affected; artificial: as, unnatural images or descriptions.
Acting without the affections of our common nature; not having the feelings natural to humanity; being without natural instincts: as, an unnatural parent.
Not natural; contrary to nature; monstrous; especially, contrary to the natural feelings: as, unnatural offenses.

Toward.
Synonyms Wilful, Contrary, etc. (see wayward), intractable.
Inconvenient; troublesome; vexatious; unfortunate; unlucky: as, an untoward event; an untoward vow.
Froward; perverse; refractory; not easily guided or taught.

Strained, Constrained, Eery, Spooky, Stilted, Unco, Violent, Agonistic, Ugly, Monstrous, Uncanny, Eerie, Contrived, Artificial, Grotesque

Unnatural, Abnormal, Inappropriate, Undesirable, Uncomely, Unfavourable, Unfavorable, Inauspicious, Indecent, Harmful, Unbecoming, Improper, Adverse, Unseemly, Indecorous

Strained, Constrained, Eery, Spooky, Stilted, Unco, Violent, Agonistic, Ugly, Monstrous, Uncanny, Eerie, Contrived, Artificial, Grotesque

Unnatural, Abnormal, Inappropriate, Undesirable, Uncomely, Unfavourable, Unfavorable, Inauspicious, Indecent, Harmful, Unbecoming, Improper, Adverse, Unseemly, Indecorous

Chances are, it will feel scary and unnatural.
His honesty and incorruptibility were insurmountable, almost unnatural.
These sorts of differences are not unnatural, however.
Melanoma appears as unnatural growth, mostly in moles.
Natural is now considered unnatural and the unnatural is natural.
Society which lives by fear alone is an unnatural Society in an unnatural State.
Unnatural carnal knowledge is sexual intercourse with a person in an unnatural manner or with an animal.
She told me both children had an unnatural beauty, an unnatural goodness.
Mohawks, unnatural balding, unnatural single patches of hair, asymmetrical styles, etchings, braids, locks and twists are not allowed.
When unnatural thinness became attractive, girls did unnatural things to be thin.

On the third morning, however, an untoward incident occurred.
The definition of untoward is inappropriate, unexpected or unwanted.
Nettles, Woodward, and Matthew that something untoward had occurred.
It clunked back tothe deck, but nothing untoward happened.
Sister did anything untoward to secure the beneficiary designation.
Cause of Failure and Untoward Sequellae in Conductive Anesthesia.
Vivi with what I felt was untoward delight.
Observes and reports, as needed, any untoward reactions.
No untoward effects attributable to thymopentin were observed.
Untoward Events Practitioners are obligated to report to MHN of the occurrence of Untoward Events experienced by a MHN member.

How does the story of the untoward event illustrate the morbid habit of his mind and the bitter passions that he bore?
Why report adverse and untoward incidents and safeguarding?
Do you feel anything untoward when retrieving an ashtray for smoking guests?
Is it possible for a driver to get into an untoward posture?
Will there be any untoward incident during Bangla Bandh in Bengal?
What happens if a guard is injured in an untoward incident?
What has the Sentinel&serious untoward event policy done for US?
What is the untoward generation according to Peter?
What are serious untoward incidents for investigation (suis)?