The phrase "iron lady" is often used to describe a powerful and determined woman, with Margaret Thatcher being one of the most well-known examples. However, there are other words and phrases that can be used interchangeably such as "steel magnolia," "warrior woman," "indomitable," "unwavering," "resolute," and "steadfast." These words describe traits of strength, determination, and courage. Other synonyms that are more subtle yet convey the same spirit include "fearless," "unyielding," and "tenacious." Regardless of the word used, the idea behind an 'iron lady' remains the same - a woman who is strong, capable, and uncompromising in her beliefs.