Difference between Unnatural and Stilted

UNNATURAL vs STILTED: ADJECTIVE

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

Artificially formal
Stiffly or artificially formal; stiff.
Having some vertical length between the impost and the beginning of the curve. Used of an arch.
An arch in which the springing line is some distance above the impost, the space between being occupied by a vertical member, molded or ornamented, as a continuation of the archivolt, intrados, etc.
Stiff and artificially formal
Pompous
Supported by stilts.

Not normal
Contrary to nature
Not natural; contrary to nature; monstrous; especially, contrary to the natural feelings: as, unnatural offenses.
Acting without the affections of our common nature; not having the feelings natural to humanity; being without natural instincts: as, an unnatural parent.
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.
=Syn. 1-3. Preternatural, etc. See supernatural.
Artificial, etc. See factitious.

Elevated, as if on stilts; hence, pompous; inflated; formal; stiff and bombastic: said especially of language: as, a stilted mode of expression; a stilted style.

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

Trite, Overlong, Perfunctory, Bland, Awkward, Formulaic, Clumsy, Cliched, Ponderous, Clunky, Stagy, Affected, Artificial, Unnatural, Contrived

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

Trite, Overlong, Perfunctory, Bland, Awkward, Formulaic, Clumsy, Cliched, Ponderous, Clunky, Stagy, Affected, Artificial, Unnatural, Contrived

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.

Korean text and thus presents stilted or incorrect English output.
Unfortunately, it comes across as a bit stilted to me.
Purple, lean, evocative, muscular, literary, exuberant, lucid, stilted, economical.
The result is sometimes a staccato or stilted style.
His Arabic accent was affected by stilted British inflection.
Berlin seemed dated and a little stilted to me.
In contrast, his writing was childlike and stilted.
The latter is often stilted, trite, and anachronistic.
RPG Chaos Wars is generally stilted and unemotional.
People do not expect stilted or formal language.