Answer: concordance

AnswerCrossword Clue
concordanceThe inheritance by two related individuals (esp. twins) of the same genetic characteristic, such as susceptibility to a disease
concordancean alphabetical index of the principal words in a book or the works of an author with their immediate contexts
concordanceAn alphabetical list of the words (esp. the important ones) present in a text, usually with citations of the passages concerned
concordanceAgreement