Bellicosity is the characteristic of being bellicose - warlike and aggressive in nature.

Bellicosity, verbosity, atrocity,

Jingo is a derogatory term for an extreme patriot, someone who advocates aggressive and warlike foreign policy to assert their country's power. It can also refer to a person who displays excessive nationalism and bellicosity.

The suffix is -ty. "Animus" is the original Latin root, meaning "spirit" and the -ty is the suffix (which creates a noun denoting a condition) -- thus the new word, "animosity." It is similar to the words bellicosity (from "bellus") and verbosity (from "verbum").