Synonyms|1.3kAntonyms|97|Broader|29Narrower|303Related|587
1
Jurassic period
1
Lower Carboniferous
1
Lower Carboniferous period
1
Missippian period
1
Mississippian
1
Ordovician
1
Ordovician period
1
Pennsylvanian
1
Pennsylvanian period
1
Permian
1
Permian period
1
Quaternary
1
Quaternary period
1
Silurian
1
Silurian period
1
Tertiary
1
Tertiary period
1
Triassic
1
Triassic period
1
Upper Carboniferous
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ChicagoSmart Define. 2015. "period thesaurus" https://smartdefine.org/period/thesaurus/narrower (accessed September 24, 2026).
HarvardSmart Define 2015, period thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/period/thesaurus/narrower>.
MLASmart Define. "period thesaurus" 9 November 2015. Web. 24 September 2026. <https://smartdefine.org/period/thesaurus/narrower>