The antonym for the word "more symbiotic" is "less symbiotic". When two organisms are less symbiotic, they do not have a mutually beneficial relationship. Instead, their relationship is parasitic, where one organism benefits at the expense of the other. For example, a tick feeds on a host's blood but does not offer any benefit to the host. Other antonyms for "more symbiotic" include "competitive" and "predatory". In a competitive relationship, organisms compete for resources, while in a predatory relationship, one organism feeds on the other. Therefore, understanding the antonyms of "more symbiotic" can help one appreciate the significance of symbiosis in nature.