mystery

As a noun mystery

is something secret or unexplainable; an unknown.

As an adjective undefined is

lacking a definition or value.

As nouns the difference between mystery and untruth

is that mystery is something secret or unexplainable; an unknown while untruth is a lie or falsehood.

As nouns the difference between mystery and revelation

is that mystery is something secret or unexplainable; an unknown while revelation is revelation.

As nouns the difference between incognito and mystery

is that incognito is one unknown or in disguise, or under an assumed character or name while mystery is something secret or unexplainable; an unknown.

As an adjective incognito

is without being known; in disguise; in an assumed character, or under an assumed title.

As an adverb incognito

is without revealing one's identity.

As nouns the difference between enigmas and mystery

is that enigmas is plural of enigma while mystery is something secret or unexplainable; an unknown.

Mystery is a related term of dilemma.

As nouns the difference between mystery and dilemma

is that mystery is something secret or unexplainable; an unknown while dilemma is dilemma (a situation with two (or more) alternatives to choose from, and where all alternatives are unsatisfactory or undesirable ).

As nouns the difference between mystery and null

is that mystery is something secret or unexplainable; an unknown while null is zero, nil; the cardinal number before einn.

As nouns the difference between mystery and clearance

is that mystery is something secret or unexplainable; an unknown while clearance is the act of clearing or something (such as a space) cleared.