era, n.
(eras)
freq. cnt. 14
(eras)
freq. cnt. 14

<noun.time> freq. cnt.: 19 freq. cnt.: 14 freq. cnt.: 5
epoch era
lexical pointers
derivationally related form
semantic pointers
hypernym
instance hyponym
hyponym

<noun.time>
era geological era
semantic pointers
hypernym
instance hyponym
Cenozoic, Cenozoic era, Age of Mammals
Mesozoic, Mesozoic era, Age of Reptiles
Paleozoic, Paleozoic era
part holonym
part meronym