The term "cardiacal" refers to anything related to the heart, but there are many synonyms that can be used to describe this concept in different ways. Some options include "cardiac," "cardiovascular," or "heart-related." Other possibilities might include "circulatory," "vascular," or "pulmonary," depending on the specific context in which the word is being used. There are also more colloquial or informal synonyms, such as "heartfelt" or "passionate," which might be used in a poetic or figurative sense. Whatever word is chosen, it should be appropriate for the situation and convey the desired meaning clearly and accurately.