Protector.
Newer.
Freer
CALENDAR : a list of days or months, a schedule (cannot be spelled -er)
It's just plainer, nothing special is done to it.
Happier
He has = Er hat
Protector.
Newer.
Freer
Er
The correct spelling of at-er-on-dex is the Adirondacks, a country-like region of North America.
endoplasmic reticulum
exhilarating
w a t er sign.
It is correct as carry ons or carry-ons.
CALENDAR : a list of days or months, a schedule (cannot be spelled -er)