There are many synonyms for the term "defence force", which is often used to refer to a country's military. Some alternatives include "armed forces", "military forces", "military personnel", "troops" and "soldiers". Other phrases that can have similar meanings include "national security forces", "defense establishment" and "military establishment". Depending on the context in which it is used, a range of other terms may be appropriate as well. For example, when discussing a specific branch of a country's military, terms like "navy", "air force" and "army" may be more applicable. Ultimately, the choice of synonym will depend on the specific writing context and intended tone.