I made an attempt to try this through Tableau Prep.
The flow is shown below and is attached.
The first step was to split the question by right-clicking
on that field, selecting Split, then Custom Split, then
" " (space) as the separator and "All" for split off fields.
Then the next step was to pivot all those fields.
And create a new output.
Then in your dashboard, you can just link
the [Term] field to [Pivot Field Values].
You should be able to multi-select words.
OF NOTE: this is a one-time split,
so if new questions arise with more than the current
number of words, the extra words will be cut off.
Possibly with a wildcard search on fields containing SPLIT
this may update itself. Also Prep is soon to become scheduled
so that will help with auto-updating the Flow.
Please see twbx v2018.2, tflx v2019.1, and .hyper attached in the Forum Thread: