different between spendable vs sendable

English

spend +? -able

spendable (comparative more spendable, superlative most spendable)

Capable of being spent.
Even though there is a lot of money in the treasury, some of it has to be kept for next year, so only part of it is spendable.
- 1969, Maya Angelou, I Know Why the Caged Bird Sings, New York: Bantam, 1971, Chapter 28, p. 183,^[1]
  He had told me once that “all knowledge is spendable currency, depending on the market.”

From Middle English sendable, sendeabyll, sendabylle, equivalent to send +? -able.

sendable (comparative more sendable, superlative most sendable)

Send