A warrior was a type of fighter.
Leela was the greatest warrior in the history of the Sevateem, who sacrificed her life to save her tribe. (AUDIO: The Catalyst) The Fourth Doctor's companion Leela was named in her honour. (AUDIO: The Catalyst, Arbitration, The Abandoned)
Krontep was ruled by a warrior king and his queen. During part of his reign, Yrcanos's queen was Peri. (TV: The Trial of a Time Lord: Mindwarp/The Ultimate Foe)
In the language of the Gamma Forests, the word "doctor" meant "mighty warrior". (TV: A Good Man Goes to War)
Renad was a Venedelan warrior. (PROSE: The Gods of the Underworld)
The Thals were originally a famous race of warriors, but became farmers after the neutronic war on Skaro. The Thal Ganatus wondered if the Daleks had become warriors themselves. (TV: "The Escape")
Shortly before his death on Karn and supposing there wasn't a need for a doctor during the Time War, the Eighth Doctor asked the Sisterhood of Karn to bring him a pre-prepared potion that would make him regenerate into a warrior. (TV: The Night of the Doctor) This next incarnation, the War Doctor, was referred to by Clara Oswald as "the warrior". Clara claimed to the Eleventh Doctor that "[w]e've got enough warriors," and what he should do is what he had always done: be a doctor. (TV: The Day of the Doctor)
Warrior was a caste in the Sensorite caste system on the Sense Sphere. They were identified by the distinct markings on their sleeves. One such Warrior arrested the Fourth Sensorite twice. (TV: The Sensorites)