What is the difference between a disease and a disorder, a condition, and a syndrome?

Dis-order - disturbed order. Our body normal works in an orderly fashion. Any anomaly/ aberration from the orderly state. Eg Mental Disorder; Menstrual disorder Dis-ease - A disordely or abnormally functioning organ or system. Acid peptic disease Condition - describes state of health. i.e. patient was in poor condition; Syndrome - consider that each of the above is a flower, and syndrome is a floral bouquet. Involved of multiple organs/ organ systems with specific symptoms and signs. AIDS (Acquired Immune Deficiency Syndrome)

Well, the relationships between related things like medical terms related to health and sickness could be presented in Venn Diagram for education/explanation purposes for sure. So if you'd represent the health and sickness as two circles they should be separated from each other as demanded by the negating nature of there existence nature. If you have one, then by default you don't have the other. Then when it comes to things inside each of these two circles, illness (sickness) for instance, you could look into descriptive categorical terms that were given to phenomenonae within it. Wether that was for causative agents, underlying pathological processes or clinical presentations, you notice scholars, righteously, grouped similar things together and each group was given a descriptive referential name. So you could start from the illness itself and say you have physical and mental illnesses. Then you go a step further down the ladder and say: the physical illnesses could be injuries, inflammations, masses .... Then take inflammations, they could be due to wounds, in fictions or burns... Then infictions (causally) could be bacterial, viral, ... Then you might notice that some symptoms (manifestation of an illness) could present in a specific way, that commonly, occurs together as to constitute a distinct clinical picture then you call this set of symptoms a SYNDROME. In another instances, you might be able to understand the underlying pathological processes that are resulting in those signs and symptoms and then you call that x DESEAES. And at times, you notice symptoms and and see signs of illness that definitely coney a disrupted physical or mental capacity or function without being able to find consistent and definite underlying structural deficits or abnormality then you call it a DISORDER. As you might have noticed, those terms are linguistic words which already has some relevant descriptive meaning to which the professionals added some technical meaning based on certain scientific observational perspective.    They all serve as a common communication language between scientists. Regards.