Dysphagia : It is a difficulty in swallowing, most often associated with disease or disorder of the throat or oesophagus.
Dyspepsia : A form of indigestion often persistent, which may be due to irregular meal times and sometimes associated with anxiety and apprehension.
Constipation :It is a condition in which there is difficulty in emptying the bowels, usually associated with hardened faeces.
Diphyodont is the condition of having two set of teeth during the life of an organism. For example : humans are diphyodont as they have two set of teeth namely temporary milk or deciduous teeth which are replaced by permanent or adult teeth.