In Sulis,I couldn't use a ‘fill in the missing word’ type question.It was impossible.There would need to be flexibility that the exact word did not have to be inserted,but one with similar meaning would also be acceptable.Is this possible in Brightspace?

Our fill in the blank question allows for you to specify a few possible acceptable answers, which should help, but you would still need to anticipate what those possible answers could be.

Alternatively, if a student reports that they felt their answer was correct, remember that we can update the question for future test takers and either fix an individual student's quiz results or use Grade All Attempts if a number of students have used the same answer and you need to fix it for many.