The phrase "friend to man" is often associated with dogs, but there are many other animals that could also be considered friends to humans. Some synonyms for "friend to man" include companion, ally, confidant, protector, and supporter. Horses, cats, birds, and even some types of rodents can be incredibly loyal and form strong bonds with their human counterparts. These animals provide comfort, entertainment, and companionship, and can often sense when their humans are upset or in need of attention. As humans continue to study and learn about different animal species, it's likely that more creatures will be identified as friends to man.