strangest

As adjectives the difference between stranger and strangest

is that stranger is (strange) while strangest is (strange).

As a noun stranger

is a person whom one does not know; a person who is neither a friend nor an acquaintance.

As a verb stranger

is (obsolete|transitive) to estrange; to alienate.

As adjectives the difference between unique and strangest

is that unique is being the only one of its kind; unequaled, unparalleled or unmatched while strangest is superlative of strange.

As a noun unique

is a thing without a like; something unequalled or unparallelled.

As adjectives the difference between strongest and strangest

is that strongest is superlative of strong while strangest is superlative of strange.

As a verb stranglest

is archaic second-person singular of strangle.

As an adjective strangest is

superlative of strange.

As an adjective strangest

is superlative of strange.

As a verb stranges is

third-person singular of strange.

As a verb estrangest

is archaic second-person singular of estrange.

As an adjective strangest is

superlative of strange.