So, I've been "inspired" by JLee's great series of Word™/Phrase™ puzzles to make my own. (It's not stealing an idea if I call it "inspiration"!) As usual: each sentence contains two marked words, one of which is a Spanned Word™ and one of which is not, and the actual sentences are just for context.
The guru said, "at least one of you has (GREEN / BLUE) eyes."
You have limited weighings to find the odd coin among (NINE / TWELVE).
In the Monty Hall problem, one of your options is to (STICK / SWITCH).
I hope you will find this puzzle (INVENTIVE / DIFFICULT).
This puzzle's solution may depend on (SHAPE / SHAPES).
Will similar words make this puzzle (EASIER / SIMPLER)?
Or will you focus too much on the (DIFFERENCE / DISTINCTION)?
Don't work on this for too long or you may become (CONFUSED / ENTRANCED.)
I hope this puzzle isn't too (HARD / EASY)!
I can't think of any other relevant sentences so here are some things that annoy me: (INTERRUPTIONS / NOISE) and (STUBBORNNESS / INFLEXIBILITY).
(By the way, the previous sentence's pairs were (INDEPENDENT / UNRELATED).)
Good luck solving this (CONUNDRUM / CHALLENGE)!
So, what is this property that makes a word a Spanned Word™?
Hint:
NOISE and HINT are Spanned Word™s; FEET is a special case of a Spanned Word™.
Hint 2:
These could also be called Traversable Words.
Hint 3:
Font and case both matter. SHAPE is Spanned; SHAPES is not.