The plural is epochs.
An epoch is longer than an era. An epoch can last for more than one lifetime.
Millennium (1000 years)
The form century's is the singular possessive form of the noun century.The plural form of the noun century is centuries.The plural possessive form is centuries'.example: Despite many centuries' passage, humans make the same mistakes over and over again.
An epoch, an era, or an age.
The singular form of the plural noun centuries is century.The singular possessive form is century's.example: Will we have flying cars by the century's end?
There is no plural form. Do and Do not are verbs
The plural form of him, her, or it is them. (objective pronouns)
Bridges is the plural form of bridge.
The plural form of "is" is "are."
The plural form of "I" is "we."
The plural form of "was" is "were."
"Groceries" is the plural form of "grocery."
"Beliefs" does not have a plural form, as it is already plural. Beliefs is the plural form of belief.
The plural form of mouth is mouths. The plural form of month is months. The Mounth is a range of hills in Scotland and does not have a plural form.
The plural form of the demonstrative pronoun 'that' is those.
The plural form is metres.
Trenches is the plural form.