What is the difference between fidyah الفدية and kaffarah الكفارة?

Both terms are used to express an expiation or ransom (based on the actual context). See for example (2:85 ), (2:184 ) (in context of fast), (2:196 ) (in context of hajj), (2:229 ), (3:91 ), (5:36 ), (13:18 ), (37:17 ), (47:4 ), (57:15 ) and (7:11 ) where the qur'an quotes the term الفدية fidyah (in cases meaning both). My question is what is the distinction between both Terms?