unknown

As nouns the difference between know and unknown

is that know is knowledge; the state of knowing while unknown is (algebra) a variable (usually x'', ''y'' or ''z ) whose value is to be found.

As a verb know

is (lb) to perceive the truth or factuality of; to be certain of or that.

As an adjective unknown is

not known; unidentified; not well known.

As adjectives the difference between unknown and great

is that unknown is not known; unidentified; not well known while great is very big, large scale.

As nouns the difference between unknown and great

is that unknown is a variable (usually x, y or z) whose value is to be found while great is a person of major significance, accomplishment or acclaim.

As an interjection great is

expression of gladness and content about something.

As an adverb great is

very well in a very satisfactory manner.

Unknown is a related term of troublesome.

As adjectives the difference between unknown and troublesome

is that unknown is not known; unidentified; not well known while troublesome is giving trouble or anxiety; vexatious; burdensome; wearisome.

As a noun unknown

is (algebra) a variable (usually x'', ''y'' or ''z ) whose value is to be found.

Dark is a related term of unknown.

As adjectives the difference between dark and unknown

is that dark is having an absolute or (more often) relative lack of light while unknown is not known; unidentified; not well known.

As nouns the difference between dark and unknown

is that dark is a complete or (more often) partial absence of light while unknown is (algebra) a variable (usually x'', ''y'' or ''z ) whose value is to be found.

Unknown is a related term of disguised.

As an adjective unknown

is not known; unidentified; not well known.

As a noun unknown

is (algebra) a variable (usually x'', ''y'' or ''z ) whose value is to be found.

As a verb disguised is

(disguise).

As adjectives the difference between unknown and unforseen

is that unknown is not known; unidentified; not well known while unforseen is .

As a noun unknown

is (algebra) a variable (usually x'', ''y'' or ''z ) whose value is to be found.

Secret is a related term of unknown.

As nouns the difference between secret and unknown

is that secret is (countable|uncountable) knowledge that is hidden and intended to be kept hidden while unknown is (algebra) a variable (usually x'', ''y'' or ''z ) whose value is to be found.

As adjectives the difference between secret and unknown

is that secret is being or kept hidden while unknown is not known; unidentified; not well known.

As a verb secret

is to make or keep secret.

Concealed is a related term of unknown.

As a verb concealed

is (conceal).

As an adjective unknown is

not known; unidentified; not well known.

As a noun unknown is

(algebra) a variable (usually x'', ''y'' or ''z ) whose value is to be found.

Unknown is a related term of supernatural.

As adjectives the difference between unknown and supernatural

is that unknown is not known; unidentified; not well known while supernatural is above nature; that which is beyond or added to nature, often so considered because it is given by a deity or some force beyond that which humans are born with in roman catholic theology, is considered to be a supernatural addition to human nature.

As nouns the difference between unknown and supernatural

is that unknown is (algebra) a variable (usually x'', ''y'' or ''z ) whose value is to be found while supernatural is (countable) a supernatural being.