| noun | a rational motive for a belief or action “the reason that war was declared” |
| noun | an explanation of the cause of some phenomenon “the reason a steady state was never reached was that the back pressure built up too slowly” |
| noun | the capacity for rational thought or inference or discrimination “we are told that man is endowed with reason and capable of distinguishing good from evil” |
| noun | the state of having good sense and sound judgment “his rationality may have been impaired” |
| noun | a justification for something existing or happening “he had no cause to complain” |
| noun | a fact that logically justifies some premise or conclusion “there is reason to believe he is lying” |
| verb | decide by reasoning; draw or come to a conclusion “We reasoned that it was cheaper to rent than to buy a house” |
| verb | present reasons and arguments |
| verb | think logically “The children must learn to reason” |
| reason | verb | decide by reasoning; draw or come to a conclusion |
| ground | verb | use as a basis for; found on |
| rational | adjective | consistent with or based on or using reason |
| reasonable | adjective | marked by sound judgment |
| causal | adjective | involving or constituting a cause; causing |
| cause | verb | give rise to; cause to happen or occur, not always intentionally |
| reason | noun | the state of having good sense and sound judgment |
| reasoner | noun | someone who reasons logically |
| conclusive | adjective | forming an end or termination; especially putting an end to doubt or question |
| conclusion | noun | the act of making up your mind about something |
| arguable | adjective | capable of being supported by argument |
| argument | noun | a discussion in which reasons are advanced for and against some proposition or proposal |
| argumentation | noun | a discussion in which reasons are advanced for and against some proposition or proposal |
| arguer | noun | someone who engages in debate |
| reasoning | noun | thinking that is coherent and logical |