Difference between Sinistral and Sinister

SINISTRAL vs SINISTER: ADJECTIVE

Left lateral fault movement.
Of, facing, or on the left side.
Having the whorls of the spire revolving or rising to the left; reversed; -- said of certain spiral shells.
Of or pertaining to the left, inclining to the left; sinistrous; -- opposed to dextral.
Relating to or being a gastropod shell that has its aperture to the left when facing the observer with the apex upward.
Left-handed.
Of or facing the left side.
Preferring to use left foot or hand or eye
Of or on the left

Suggesting or threatening harm or evil.
Stemming from evil characteristics or forces; wicked or dishonorable
On or starting from the wearer's left
Threatening or foreshadowing evil or tragic developments
On the left side of a shield from the wearer's standpoint, and the right side to the viewer.
Of the left side.
Evil or seemingly evil; indicating lurking danger or harm.
Inauspicious, ominous, unlucky, illegitimate (as in bar sinister).
See under Escutcheon.
An appearance of two planets happening according to the succession of the signs, as Saturn in Aries, and Mars in the same degree of Gemini.
See under Bar, n.
Wrong, as springing from indirection or obliquity; perverse; dishonest; corrupt.
Unlucky; inauspicious; disastrous; injurious; evil; -- the left being usually regarded as the unlucky side.
On the left hand, or the side of the left hand; left; -- opposed to dexter, or right.
Situated on or being the side of a shield on the wearer's left and the observer's right.
On the left side; left.
Attended by or causing misfortune or disaster.
Portending misfortune or disaster; ominous.
Causing or intending harm or evil; wicked.
Indicative of lurking evil or harm; boding covert danger.

Of or pertaining to the left side; situated on the left hand; not dextral; sinister; sinistrous.
In conchology, reversed from the usual, right, or dextral curve, as the whorls of a spiral shell; whorled toward the left; sinistrorse; heterostrophous.
In ichthyology, having both eyes on the left side of the head, as certain flatfishes.
Sinister; wrong.

Wicked or dishonorable
Left, as opposed to right; on the left side; specifically, in heraldry, noting the left-hand side of the person who carries the shield on his arm (therefore the right-hand side of the spectator): the sinister part of the escutcheon is opposed to the dexter part (see dexter).
On or toward the left or unlucky side; hence, of ill omen; inauspicious; threatening or suggesting evil.
Bringing evil; harmful; malign; unfortunate in results.
Malicious; evil; base; wrong.
Unpleasant; disagreeable.

Spinous, Cartilaginous, Tensional, Sigmoidal, Rostral, Compressional, Arcuate, Dextral, Left, Wefts, Coiling, Left handed, Sinistrorsal, Sinistrorse, Sinister

Nefarious, Minacious, Threatening, Black, Sinistral, Forbidding, Ugly, Alarming, Dark, Baleful, Wicked, Minatory, Menacing, Ominous, Evil

Spinous, Cartilaginous, Tensional, Sigmoidal, Rostral, Compressional, Arcuate, Dextral, Left, Wefts, Coiling, Sinistrorse, Sinistrorsal, Left handed, Sinister

Nefarious, Minacious, Threatening, Black, Sinistral, Forbidding, Ugly, Alarming, Dark, Baleful, Wicked, Minatory, Menacing, Ominous, Evil

Sinistral of the Air, with traces of the Final Fantasy edition of Tiamat, the Fiend of the Air.
The relative motion of the two plates is either sinistral (left side toward the observer) or dextral (right side toward the observer).
Depending on species (or aberrant growth patterns), shell growth can be sinistral (left-handed) or dextral (right-handed).
So to speak, the dextral subspecies are counterparts of neighbouring normally coiled (sinistral) subspecies, looking like their mirror images.
Near, Port, Sinister, Sinistral, Hard to Left Nigh.

These proposals have no sinister purpose at all.
Both have a vague hint of sinister punishment.
The crowd responds violently and with sinister intent.
This song oozes sex appeal and sinister intention.
Like this extending a tight boss by means of a sinister side of the yours with the until your sinister ear.
For example, if enemy leads Mister Sinister you will want to use Ultron because Sinister will clone Ultron spawns most of the time.
Sinister in the face to get him where she wants him, but Sinister seems to like it!
Many myths and legends speak of dark and sinister figures and sinister, magical acts deep in the woods.
If Mister Sinister is an ally, transfer all positive effects from the primary target to Mister Sinister.
The backcountry Marlow travels through is sinister, and the natives become more sinister as well.