- Any threat to a person, group, or nation
- Any defense that needs to be taken to avoid that threat
- General need for greater security
- Anything about the border
- Securing the border with a fence or wall
- “Crossings” or “illegal crossings” (referring to borders)
- Terrorism or risk of immigrants being terrorists
- Invasions or descriptions of immigrants as invaders
- Open (door) or (un)controlled immigration (also policy)
- Death threats or other violent threats