It's about the number of Elements on the Periodic Table.
(a.k.a. Periodic Table of the Elements, a.k.a chemical elements) (confirmed elements as of 2016)
From element number one, hydrogen, to element one-hundred eighteen, ununoctium, there are 118 confirmed elements on the Periodic Table. Ninety-four of the elements exist in nature, and the remaining twenty-four have only been synthesized in labs (not having occurred naturally in the time since scientists have begun researching them)
It's about one-and-one-tenth times the number of Wolves in Yellowstone National Park.
In other words, 118 is 1.130 times the count of Wolves in Yellowstone National Park, and the count of Wolves in Yellowstone National Park is 0.8850 times that amount.(a.k.a. Henihco'oo; a.k.a. Héetíhco'oo) (December 2014 figures; Wyoming Park area)
As of the 2014 population count, there were 104 wolves living in Yellowstone National Park, in twelve packs. All of the wolves now living in the Park are thought to have descended from the 66 wolves (re)introduced into the Park in 1995-96.
It's about nine-tenths the number of Union Stations in the United States.
In other words, 118 is 0.8740 times the count of Union Stations in the United States, and the count of Union Stations in the United States is 1.140 times that amount.(a.k.a. Union Terminal; a.k.a. Joint Station; a.k.a. Union Depot) (2016 figures)
Typically shared between multiple railroad companies and stations, there are about 135 "Union Stations" in the United States. Of these, the busiest station is Chicago Union Station, which handles 120,000 passengers each year.
It's about four-fifths the number of Moons in our Solar System.
In other words, 118 is 0.8080 times the count of Moons in our Solar System, and the count of Moons in our Solar System is 1.240 times that amount.(2015 figures) (confirmed moons only; dwarf planet satellites not included)
It's about one-and-three-tenths times the number of Keys on a Piano.
It's about two-thirds the number of John Wayne films.
In other words, 118 is 0.6630 times the count of John Wayne films, and the count of John Wayne films is 1.510 times that amount.(a.k.a. "Duke", a.k.a. JW, a.k.a. Marion Mitchell Morrison, a.k.a. Marion Robert Morrison, a.k.a. Duke Morrison) (films starring the actor in any size role)
It's about one-and-three-fifths times the number of Submarines in the US Navy.
In other words, the count of Submarines in the US Navy is 0.630 times 118.(a.k.a. Subs) (includes all types, all classes) (2015 figures)