Able to eat anything and Omnivorous

Omnivorous and able to eat anything are semantically related In some cases you can replace term "Omnivorous" with "Able to eat anything", this terms are similar.

Omnivorous adjective - Feeding on both plants and animals.

Able to eat anything and omnivorous are semantically related in eating a mixed diet topic. You can use "Able to eat anything" instead an adjective "Omnivorous".