Synonyms of four fold

Adjective

1. quadruple, quadruplicate, quadruplex, fourfold, four-fold, multiple (vs. single)

usage: having four units or components; "quadruple rhythm has four beats per measure"; "quadruplex wire"

2. quadruple, fourfold, four-fold, multiple (vs. single)

usage: four times as great or many; "a fourfold increase in the dosage"

Adverb

1. fourfold, four times

usage: by a factor of four; "the price of gasoline has increased fourfold over the past two years"