A-W of words containing letters "er" anywhere in the word (Part 1)

Clobber

Dervish

Effervescent

Farrier

Glitter

Mermaid

Harrier

Improviser

Joker

Keeper

Laster (heh!)

Master

Noisier

Operator. (Give me Jesus on the line)

Poser

Quercus

:nerd_face: EZ!

Revolutioniser

Servitude

Tester

Undergrowth