different between merrythought vs kindness

English

merry +? thought, traditionally explained with reference to the pleasant thoughts imagined when the bone is ritually broken.

merrythought (plural merrythoughts)

(archaic) The furcula or wishbone.
- 1688, Randle Holme, The Academy of Armory, Chester, Book 2, Chapter 13, p. 307,^[1]
  All Birds want the Channel-bones in the Breast, instead whereof they have a bone, which we call the Merry thought.

From Middle English kindenesse, equivalent to kind +? -ness.

kindness (countable and uncountable, plural kindnesses)

The state of being kind.
An instance of kind or charitable behaviour.
How can I thank you for your many kindnesses?
Do me a kindness and leave.

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