unfamiliar

As adjectives the difference between mysterious and unfamiliar

is that mysterious is of unknown origin while unfamiliar is strange, not familiar.

As a noun unfamiliar is

an unfamiliar person; a stranger.

As nouns the difference between unfamiliar and foreigner

is that unfamiliar is an unfamiliar person; a stranger while foreigner is a person from a foreign country.

As an adjective unfamiliar

is strange, not familiar.

As adjectives the difference between unforeseen and unfamiliar

is that unforeseen is not foreseen while unfamiliar is strange, not familiar.

As a noun unfamiliar is

an unfamiliar person; a stranger.

Exotic is a synonym of unfamiliar.

As adjectives the difference between exotic and unfamiliar

is that exotic is exotic while unfamiliar is strange, not familiar.

As a noun unfamiliar is

an unfamiliar person; a stranger.

Unfamiliar is a related term of curious.

As adjectives the difference between unfamiliar and curious

is that unfamiliar is strange, not familiar while curious is (lb) fastidious, particular; demanding a high standard of excellence, difficult to satisfy.

As a noun unfamiliar

is an unfamiliar person; a stranger.

Unusual is a related term of unfamiliar.

As adjectives the difference between unusual and unfamiliar

is that unusual is unlike what is expected; differing in some way from the norm while unfamiliar is strange, not familiar.

As a noun unfamiliar is

an unfamiliar person; a stranger.

Unfamiliar is a related term of irregular.

As adjectives the difference between unfamiliar and irregular

is that unfamiliar is strange, not familiar while irregular is irregular.

As a noun unfamiliar

is an unfamiliar person; a stranger.

As nouns the difference between unfamiliar and strangeness

is that unfamiliar is an unfamiliar person; a stranger while strangeness is the state or quality of being strange, odd or weird.

As an adjective unfamiliar

is strange, not familiar.

As adjectives the difference between uncommon and unfamiliar

is that uncommon is rare; not readily found; unusual while unfamiliar is strange, not familiar.

As a noun unfamiliar is

an unfamiliar person; a stranger.

As adjectives the difference between unfamiliar and unlikely

is that unfamiliar is strange, not familiar while unlikely is not likely; improbable; not to be reasonably expected.

As nouns the difference between unfamiliar and unlikely

is that unfamiliar is an unfamiliar person; a stranger while unlikely is something or somebody considered unlikely.

As an adverb unlikely is

in an improbable manner.