"Blood-red states" is a phrase that is often used to describe American states that tend to vote overwhelmingly for the Republican Party. However, there are several synonyms for this phrase that can be used to add variety to one's writing. Some examples include "ruby-red states", "scarlet states", "vermilion states", and "crimson states". These synonyms all draw on the color red to convey the idea of strong Republican support, while offering slightly different shades and hues to describe these states. By using synonyms like these, one can add color and nuance to their writing while still conveying the same basic idea.