esoteric

As adjectives the difference between internal and esoteric

is that internal is inside of something while esoteric is intended for or likely to be understood by only a small number of people with a specialized knowledge or interest, or an enlightened inner circle.

As adjectives the difference between esoteric and equivocal

is that esoteric is intended for or likely to be understood by only a small number of people with a specialized knowledge or interest, or an enlightened inner circle while equivocal is having two or more equally applicable meanings; capable of double or multiple interpretation; ambiguous; uncertain.

As a noun equivocal is

a word or expression capable of different meanings; an ambiguous term; an equivoque.

As adjectives the difference between esoteric and etheric

is that esoteric is intended for or likely to be understood by only a small number of people with a specialized knowledge or interest, or an enlightened inner circle while etheric is of or pertaining to the ether (all-pervading medium).

As an adjective esoteric

is intended for or likely to be understood by only a small number of people with a specialized knowledge or interest, or an enlightened inner circle.

As a noun religion is

religion.

As adjectives the difference between esoteric and tough

is that esoteric is intended for or likely to be understood by only a small number of people with a specialized knowledge or interest, or an enlightened inner circle while tough is strong and resilient; sturdy.

As an interjection tough is

(slang) (used to indicate lack of sympathy).

As a noun tough is

a person who obtains things by force; a thug or bully.

As a verb tough is

to endure.

As adjectives the difference between erudite and esoteric

is that erudite is learned, scholarly, with emphasis on knowledge gained from books while esoteric is intended for or likely to be understood by only a small number of people with a specialized knowledge or interest, or an enlightened inner circle.

As an adjective esoteric

is intended for or likely to be understood by only a small number of people with a specialized knowledge or interest, or an enlightened inner circle.

As a proper noun enigma is

a german device used during world war ii to encode strategic messages.

As a noun niche

is a cavity, hollow, or recess, generally within the thickness of a wall, for a statue, bust, or other erect ornament. Hence, any similar position, literal or figurative.

As a verb niche

is {{cx|transitive|marketing|lang=en}} To specialize in a niche, or particular narrow section of the market.

As an adjective esoteric is

intended for or likely to be understood by only a small number of people with a specialized knowledge or interest, or an enlightened inner circle.

As adjectives the difference between esoteric and opaque

is that esoteric is intended for or likely to be understood by only a small number of people with a specialized knowledge or interest, or an enlightened inner circle while opaque is neither reflecting nor emitting light.

As a noun opaque is

(obsolete|poetic) an area of darkness; a place or region with no light.

As a verb opaque is

to make, render (more) opaque.

As adjectives the difference between spiritual and esoteric

is that spiritual is of or pertaining to the spirit or the soul while esoteric is intended for or likely to be understood by only a small number of people with a specialized knowledge or interest, or an enlightened inner circle.

As a noun spiritual

is a Christian religious song, especially one in an African-American style, or a similar non-religious song.