The answer would be hose. It is hose because the word pair is Plumber Wrench __ And a plumber and a wrench are apart of work tools. And a Baker is not a chef sailor is not a weather patient is not a nurse is not and a firefighter is not the only one left is hose, plus it is a work tool.
The key of criterion of validity is geo0⅔
Answer: portmanteau
Explanation: a portmanteau is a word
And it’s formed by using two different terms into one.
I believe it is Quantity.