As nouns the difference between fruitarian and fruitarianism
is that fruitarian
is a variant of vegetarian who intends to be limited to eating only such parts of plants whose consumption does not kill the plant (such as fruits, vegetables that can be compared to fruit, nuts and grain, but not for example tubers) the purest fruitarians
do not want to destroy even the seeds while fruitarianism
is the practice of being a fruitarian.