unusual

As an adjective unusual

is unlike what is expected; differing in some way from the norm.

As a noun exception is

the act of excepting or excluding; exclusion; restriction by taking out something which would otherwise be included, as in a class, statement, rule.

As adjectives the difference between original and unusual

is that original is relating to the origin or beginning; preceding all others while unusual is unlike what is expected; differing in some way from the norm.

As a noun original

is an object or other creation (e.g. narrative work) from which all later copies and variations are derived.

As adjectives the difference between unnormal and unusual

is that unnormal is not normal while unusual is unlike what is expected; differing in some way from the norm.

As adjectives the difference between unusual and obscure

is that unusual is unlike what is expected; differing in some way from the norm while obscure is dark, faint or indistinct.

As a verb obscure is

(label) to render obscure; to darken; to make dim; to keep in the dark; to hide; to make less visible, intelligible, legible, glorious, beautiful, or illustrious.

As adjectives the difference between unusual and eclectic

is that unusual is unlike what is expected; differing in some way from the norm while eclectic is selecting a mixture of what appears to be best of various doctrines, methods or styles.

As a noun eclectic is

someone who selects according to the eclectic method.

As adjectives the difference between unusual and unsustainable

is that unusual is unlike what is expected; differing in some way from the norm while unsustainable is not sustainable.

As adjectives the difference between unusual and amazing

is that unusual is unlike what is expected; differing in some way from the norm while amazing is causing wonder and amazement; possessing uniquely wonderful qualities.

As a verb amazing is

.

As adjectives the difference between characteristic and unusual

is that characteristic is being a distinguishing feature of a person or thing while unusual is unlike what is expected; differing in some way from the norm.

As a noun characteristic

is a distinguishable feature of a person or thing.

Unusual is a related term of vivid.

As adjectives the difference between unusual and vivid

is that unusual is unlike what is expected; differing in some way from the norm while vivid is (of perception) clear, detailed or powerful.

As a noun vivid is

(new zealand) a felt-tipped permanent marker.

Romantic is a related term of unusual.

As adjectives the difference between romantic and unusual

is that romantic is romantic (pertaining to the romance era) while unusual is unlike what is expected; differing in some way from the norm.