A-W of words containing letters "er" anywhere in the word

Keratin

Kilter

Livers

Merrier

Nevertheless

Overextended

Perspectives

Querulous

Reversing

Starrier

Terrifying

Umberage

Vermin (Fawlty)

Wanderer

Auvergne

Berries

Cherries

Derringer

Erring

Fermentations