Dangerous
Dangerous adjective - Involving potential loss or injury.
First class and dangerous are semantically related. In some cases you can use "First class" instead an adjective "Dangerous".
Nearby Words: danger, dangerously
First class
First class noun - Mail that includes letters and postcards and packages sealed against inspection.
Dangerous and first class are semantically related. Sometimes you can use "Dangerous" instead an adjective phrase "First class".
Both terms in one sentence
- The Scout is the first class where you really need to work to be dangerous, though—it has little enough health that a single shot from a Soldier's tank mode can kill.
Source: Difficult but Awesome - In X-Men: First Class, minutes after the mutants single-handedly prevent World War III, the military tries to kill them since they were deemed too dangerous.
Source: Ungrateful Bastard -
A-rate Ghouls are considered Dangerous predators, and equal in strength to a senior First Class Investigator.
Source: Rank Inflation
Cite this Source
First class and Dangerous. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/dangerous/first_class
Dangerous & First class. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/dangerous/first_class>.
First class or Dangerous. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/dangerous/first_class.
Google Ngram Viewer shows how "dangerous" and "first class" have occurred on timeline