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

Neper (from John Napier, mathematician )

Overactive

Perambulation

Quiniferous

Router

Streamer

Termite

Utterance

Vermillion

Werewolf

Altercations

Buttermilk

Carer

Derived

Eider

Ferrous

Gender

Heron

Interesting

Jumper