A similar change is care, cares, caress, but these are not nouns.
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Puzzle 110
I am a 10-letter word.
My 9, 6, 1, 2 is something a swimmer might do.
My 5, 4, 4, 3 is not that hot really.
My 7, 4, 3, 2 is a long piece of wood.
My 7, 6, 8, 5, 10 is a small part of something.
My 3, 4, 1, 10 is a deep affection.
My 7, 6, 8 is something you can eat.
My whole is an old form of transport.
Hint
The letters come from the two words on the outside.
Answer
Leap.
From the third letter of the second word, plus the third letter of the first word, plus the second letter of the second word, plus the fourth letter of the first word.
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Puzzle 112
A donkey is tied to a rope 6 feet long and there is a bale of hay 8 feet away.
How can the donkey get to the hay if he does not bite or undo the rope?