Which of the following words is synonymous with 'similarity'?

The word 'resemblance' is synonymous with 'similarity' because both terms convey the idea of likeness or having characteristics in common. When something shares features, qualities, or attributes with another, it exemplifies a degree of similarity or resemblance. In many contexts, these two words can be used interchangeably to describe objects, ideas, or people that exhibit comparable traits.

In contrast, the other terms emphasize distinctions rather than likeness. For instance, 'disparity' and 'difference' highlight a lack of similarity or a divergence between two entities, while 'dissimilarity' directly indicates that two things are not alike. Thus, 'resemblance' appropriately captures the essence of similarity, making it the correct choice.