The term 'related by blood' can be expressed in four different ways using crossword solutions. The first is 'KINDRED', which is a seven letter word meaning having a common ancestor or being related by blood. The second is 'AKIN', which is a four letter word meaning similar or related in nature. The third is 'KIN', which is a three letter word meaning family or relatives. The fourth is 'COGNATE', which is a seven letter word meaning having the same origin or related by blood. All of these words refer to the idea of being related by blood, either through a common ancestor or through shared characteristics.