As nouns the difference between break and rear
is that break
is break while rear
is the back or hindmost part; that which is behind, or last on order; - opposed to front.
As a verb rear is
to raise physically; to lift up; to cause to rise, to elevate or rear
can be to move; stir or rear
can be to place in the rear; to secure the rear of.
As an adjective rear is
(of eggs) underdone; nearly raw or rear
can be being behind, or in the hindmost part; hindmost; as, the rear rank of a company.
As an adverb rear is
(british|dialect) early; soon.