Synonyms for (adjective) 4th

Synonyms: 4th, fourth, quaternary

Definition: coming next after the third and just before the fifth in position or time or degree or magnitude

Usage: the quaternary period of geologic time extends from the end of the tertiary period to the present

Similar words: ordinal

Definition: being or denoting a numerical order in a series

Usage: ordinal numbers; held an ordinal rank of seventh