unnatural

As an adjective unnatural

is not natural; supernatural or artificial.

As a letter x is

the twenty-fourth letter of the.

As a symbol x is

voiceless velar fricative.

As adjectives the difference between surreal and unnatural

is that surreal is resembling a dream: fantastic and incongruous while unnatural is not natural; supernatural or artificial.

As a noun surreal

is (math) surreal number.

As adjectives the difference between unnatural and fake

is that unnatural is not natural; supernatural or artificial while fake is not real; false, fraudulent.

As a noun fake is

something which is not genuine, or is presented fraudulently or fake can be (nautical) one of the circles or windings of a cable or hawser, as it lies in a coil; a single turn or coil.

As a verb fake is

to cheat; to swindle; to steal; to rob or fake can be (nautical) to coil (a rope, line, or hawser), by winding alternately in opposite directions, in layers usually of zigzag or figure of eight form, to prevent twisting when running out.

As adjectives the difference between unnatural and synthetic

is that unnatural is not natural; supernatural or artificial while synthetic is of, or relating to synthesis.

As a noun synthetic is

a synthetic compound.

As adjectives the difference between unnatural and undefined

is that unnatural is not natural; supernatural or artificial while undefined is lacking a definition or value.

As adjectives the difference between unnatural and magical

is that unnatural is not natural; supernatural or artificial while magical is of or relating to magic.

As adjectives the difference between plain and unnatural

is that plain is while unnatural is not natural; supernatural or artificial.

As an adverb plain

is (colloquial) simply.

As a noun plain

is (rare|poetic) a lamentation or plain can be an expanse of land with relatively low relief.

As a verb plain

is to lament, bewail or plain can be (obsolete|transitive) to plane or level; to make plain or even on the surface.

Unnatural is a synonym of extraordinary.

As adjectives the difference between extraordinary and unnatural

is that extraordinary is not ordinary; exceptional; unusual while unnatural is not natural; supernatural or artificial.

Idiosyncratic is a related term of unnatural.

As adjectives the difference between idiosyncratic and unnatural

is that idiosyncratic is peculiar to a specific individual; eccentric while unnatural is not natural; supernatural or artificial.

Unnatural is a related term of unsettled.

As adjectives the difference between unnatural and unsettled

is that unnatural is not natural; supernatural or artificial while unsettled is disturbed, upset.

As a verb unsettled is

(unsettle).