The term "dog fox" refers to a male fox, typically known for their hunting and scavenging abilities. If you're looking for synonyms for the phrase, some good options to consider are "vixen hunter," "canine predator," or "foxy hound." Another option could be "red fox," which is a common type of fox found in many regions worldwide. Other synonyms for the word "fox" itself might include "sly," "crafty," or "wily." Ultimately, the particular synonym you choose will depend on the context in which you're using it and the specific connotations you're looking to convey.