unusual

Inventive is a related term of unusual.

As adjectives the difference between inventive and unusual

is that inventive is of, or relating to invention while unusual is unlike what is expected; differing in some way from the norm.

Unusual is a related term of indecorous.

As adjectives the difference between unusual and indecorous

is that unusual is unlike what is expected; differing in some way from the norm while indecorous is improper, immodest or indecent.

Unusual is a related term of sick.

As adjectives the difference between unusual and sick

is that unusual is unlike what is expected; differing in some way from the norm while sick is in poor health.

As a noun sick is

sick people in general as a group.

As a verb sick is

to vomit or sick can be (rare).

Unusual is a related term of vigorous.

As adjectives the difference between unusual and vigorous

is that unusual is unlike what is expected; differing in some way from the norm while vigorous is physically strong and active.

As an adjective unusual is

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

Unusual is a related term of unfitting.

As adjectives the difference between unusual and unfitting

is that unusual is unlike what is expected; differing in some way from the norm while unfitting is that is not fitting for its purpose.

Flighty is a related term of unusual.

As adjectives the difference between flighty and unusual

is that flighty is given to unplanned and silly ideas or actions while unusual is unlike what is expected; differing in some way from the norm.

Exceptional is a synonym of unusual.

As adjectives the difference between unusual and exceptional

is that unusual is unlike what is expected; differing in some way from the norm while exceptional is forming an exception; not ordinary; uncommon; rare.

Eccentric is a synonym of unusual.

As adjectives the difference between unusual and eccentric

is that unusual is unlike what is expected; differing in some way from the norm while eccentric is not at or in the centre; away from the centre.

As a noun eccentric is

one who does not behave like others.

Queer is a related term of unusual.

As adjectives the difference between queer and unusual

is that queer is (now|slightly|dated) weird, odd or different; whimsical while unusual is unlike what is expected; differing in some way from the norm.

As a noun queer

is (colloquial) a person who is or appears homosexual, or who has homosexual qualities.

As a verb queer

is to render an endeavor or agreement ineffective or null.

As an adverb queer

is queerly.