18

Letters that make 18

8, 1 are letters that make '18'

are words within '18'

81 is an anagram of '18'

2 possible definitions for '18'

Under this definition, 18 is a noun and has the following properties:

eighteen, XVIII have the same meaning as '18'

'18' can be a type of large integer.

Under this definition, 18 is an adjective and has the following properties:

eighteen, xviii have the same meaning as '18'

cardinal is similar to 18.