How to Say "swelling" in Spanish
The Spanish word for “swelling” is “tumor” — B2 level.

Examples
El médico ordenó pruebas para saber si el tumor era maligno.
The doctor ordered tests to find out if the tumor was malignant.
Afortunadamente, el tumor resultó ser benigno y fácil de extirpar.
Fortunately, the tumor turned out to be benign and easy to remove.
La investigación se centra en la prevención de tumores cerebrales.
The research focuses on the prevention of brain tumors.
Masculine Noun Rule
Even though many Spanish nouns ending in -a are feminine, 'tumor' is masculine. Remember to use the masculine articles: 'el tumor' or 'un tumor'.
Incorrect Gender
Mistake: “La tumor es peligroso.”
Correction: El tumor es peligroso. (It is masculine, so use 'el' and masculine adjectives like 'peligroso'.)
Learn Spanish with Inklingo
Interactive stories, personalized learning, and more.