The term 'Allied by Nature' is used to describe two or more entities that are closely RELATED and share similar characteristics. The crossword solutions for this term are 'RELATED' (7 letters) and 'AKIN' (4 letters). Both words refer to the idea of being closely connected, either through shared traits or through a common bond. The term 'Allied by Nature' implies that the entities in question have a strong connection that goes beyond mere coincidence.