Synonyms for fourth

Noun

1. fourth, rank

usage: following the third position; number four in a countable series

2. one-fourth, fourth, quarter, fourth part, twenty-five percent, quartern, common fraction, simple fraction

usage: one of four equal parts; "a quarter of a pound"

3. fourth, interval, musical interval

usage: the musical interval between one note and another four notes away from it

Adjective

1. fourth, 4th, quaternary, ordinal (vs. cardinal)

usage: coming next after the third and just before the fifth in position or time or degree or magnitude; "the quaternary period of geologic time extends from the end of the tertiary period to the present"

Adverb

1. fourthly, fourth

usage: in the fourth place; "fourthly, you must pay the rent on the first of the month"