D, d is the fourth letter in the English alphabet and it has synonyms that could be related to it, such as "delta", "daughter", "dictate", "detail", "defect", "decide", "determine" and "devote". "Delta" is mainly used in the terminology of mathematics and physics as it means "the fourth letter of the ancient Greek alphabet". "Daughter" refers to a female offspring, while "dictate" means to command or order someone to do something. "Detail" is a word that signifies a thorough analysis of every aspect or component of a particular thing. "Defect" is a deviation from normalcy or a shortfall in something. "Decide" means to reach a conclusion or make a choice among available alternatives, and "determine" means to firmly decide a course of action.