Answer: doubter

AnswerCrossword Clue
DOUBTERThomas, e.g.
DOUBTERSkeptic
DOUBTERUnconvinced person.
DOUBTERNonbeliever
doubterto be uncertain
doubterone who doubts (to be uncertain about)
doubterto be uncertain and undecided about
doubterfeeling of uncertainty and indecision
doubterdistrust or suspicion
doubterto distrust