relation

As nouns the difference between entity and relation

is that entity is that which has a distinct existence as an individual unit. Often used for organisations which have no physical form while relation is the manner in which two things may be associated.

Relation is a related term of collaboration.

As nouns the difference between relation and collaboration

is that relation is relation while collaboration is (uncountable) the act of collaborating.

Relation is a related term of fraternisation.

As nouns the difference between relation and fraternisation

is that relation is relation while fraternisation is (chiefly|british).

As a noun relation is

relation.

Relation is a related term of companionship.

As nouns the difference between relation and companionship

is that relation is relation while companionship is the state of having or being a companion.

Significance is a related term of relation.

As nouns the difference between significance and relation

is that significance is the extent to which something matters; importance while relation is relation.

Application is a related term of relation.

As nouns the difference between application and relation

is that application is the act of applying or laying on, in a literal sense; as, the application of emollients to a diseased limb while relation is relation.

As nouns the difference between concern and relation

is that concern is that which affects one's welfare or happiness while relation is the manner in which two things may be associated.

As a verb concern

is to relate or belong to; to have reference to or connection with; to affect the interest of; to be of importance to.