Enervate means to deprive of force or strength; destroy the vigor of; weaken.
Usage Example: The hot climate enervates the body and leaves it listless.

Innervate means to communicate nervous energy to; stimulate through nerves.
Usage Example: Fear innervates the heart muscles and it starts beating faster.

Epigram means any witty, ingenious, or pointed saying tersely expressed.
Usage Example: Out of his huge collection we could find only a few hymns and epigrams.

Epigraph means an inscription, especially on a building, statue, or the like.
Usage Example: As the statue was unveiled, a beautiful epigraph could be read.

Epitaph means a commemorative inscription on a tomb or mortuary monument about the person buried at that site. 
Usage Example: The epitaphs on the tombstones were scarcely visible as the cemetery was very old.

Epithet can also be in sense of an offensive word or name that is used as a way of abusing or insulting someone or others.
Usage Example: Friends generally hurl one epithet after another at each other when they get together after a long time.

Equable means free from many changes or variations; uniform.
Usage Example: After the harsh winter in England, he found the climate in the Caribbean equable and pleasant.

Equitable means characterized by equity or fairness; just and right; fair; reasonable.
Usage Example: The warden made sure that the distribution of gifts amongst the children in the orphanage was equitable.

Erasable refers to something that can be rubbed/removed/scraped out, as letters or characters written or engraved.
Usage Example: The new company plans to offer erasable pens.

Irascible means easily provoked to anger; very irritable.
Usage Example: The irascible old man had a very kind heart.

Erratum is a singular noun that stands for an error in writing or printing.
Usage Example: As specified in the erratum - line 26, the word import has been corrected to importance.

Errata is a plural noun and refers to means a list of errors in a publications. 
Usage Example: There were 2000 errata in the work.

Every day means of or relating to every day; daily.
Usage Example: Every day a new problem crops up at the workplace.

Everyday means such as is met with every day; ordinary; commonplace.
Usage Example: The story of the film revolves around the everyday instances of life.

Everyone is an inclusive word referring to every person; everybody.
Usage Example: The rules of the fame were the same for everyone.

Every one refers to every individual without exception.
Usage Example: Every one of the children had bright and shining eyes at the thought of the picnic.

Everything means inclusive of all that relates to a subject or topic.
Usage Example: Everything regarding the trip was listed in the manual.

Every thing means every single thing.
Usage Example: Every thing was placed on the mantle-piece.

Evoke means to call or summon up (a memory, feeling, etc), esp. from the past.
Usage Example: Memories of days gone by evoked nostalgic images of the people attached to them.

Invoke means to call for with earnest desire; make supplication or pray for.
Usage Example: Humans tend to invoke God when in despair.

Revoke means to take back or withdraw; annul, cancel, or reverse; rescind or repeal.
Usage Example: As the mayor refused to revoke the ban, the parade was held as usual.