English is so funny a language- why should a package transfered through ship be called Cargo while that transfered through ship be called shipment?

Maybe you can tell me what babyoil is made from is oliveoil is made from olive.

Or if the past tense of teach is taught, what of that of Preach- Praught?

Why should you be able to smell with your feet and your nose can actually run?

Or what is the difference between shameless act and shameful act if less and ful are opposite?

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