What is another word for "scruple"?

Roget's Thesaurus (1911) lists these synonyms for "scruple": alacrity, analytical, arroba, aversation, averseness, avoirdupois, baby, backwardness, balance, ballast, beam, burden, burdensome, burthen, carat, centigram, conscience, counterpoise, cumber, cumbersome, cumbrous, delicacy, demur, disinclination, dislike, dissent, drachma, grain, gram, gravitate, gravitation, gravity, heaviness, heavy, hesitation, hundredweight, incumbent, indifference, indisposedness, indisposition.