"There is reason to believe he is lying"Category: General
2.Definition: a justification for something existing or happening
"He had no cause to complain", "They had good reason to rejoice"
"The reason that war was declared", "The grounds for their declaration"
Related Noun(s):groundCategory: General
"The reason a steady state was never reached was that the back pressure built up too slowly"Category: General
"We are told that man is endowed with reason and capable of distinguishing good from evil"
Related Noun(s):intellectCategory: General
"His rationality may have been impaired", "He had to rely less on reason than on rousing their emotions"