THESAURUS
take with a grain of salt
admit, admit exceptions, allow, allow for, awake a doubt, be diffident, be doubtful, be dubious, be skeptical, be uncertain, call in question, challenge, concede, consider, consider the circumstances, consider the source, contest, discount, dispute, disregard, distrust, doubt, grant, greet with skepticism, half believe, harbor suspicions, have reservations, lift temporarily, make allowance for, misgive, mistrust, provide for, query, question, raise a question, relax, relax the condition, scruple, set aside, smell a rat, suspect, take account of, take into account, take into consideration, throw doubt upon, treat with reserve, waive
