unpopular

As adjectives the difference between unique and unpopular

is that unique is (not comparable) being the only one of its kind; unequaled, unparalleled or unmatched while unpopular is lacking popularity.

As a noun unique

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

As adjectives the difference between unpopular and unfamous

is that unpopular is lacking popularity while unfamous is not famous.

As a noun dislike

is an attitude or a feeling of distaste or aversion.

As a verb dislike

is (obsolete|transitive) to displease; to offend (in third-person only).

As an adjective unpopular is

lacking popularity.

As adjectives the difference between unpopular and illiterate

is that unpopular is lacking popularity while illiterate is unable to read and write.

As a noun illiterate is

an illiterate person, one not able to read.

Odious is a synonym of unpopular.

As adjectives the difference between odious and unpopular

is that odious is arousing or meriting strong dislike, aversion, or intense displeasure while unpopular is lacking popularity.

Loathsome is a related term of unpopular.

As adjectives the difference between loathsome and unpopular

is that loathsome is highly offensive; sickening, abominable while unpopular is lacking popularity.

As a noun pariah

is an outcast.

As an adjective unpopular is

lacking popularity.

As adjectives the difference between unmeasurable and unpopular

is that unmeasurable is not able to be measured; immeasurable while unpopular is lacking popularity.

As adjectives the difference between underrated and unpopular

is that underrated is not given enough recognition for its quality while unpopular is lacking popularity.

As a verb underrated

is (underrate).

As adjectives the difference between unpopular and unpopular

is that unpopular is lacking popularity while unpopular is lacking popularity.