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

Slithering

Terrifying

Underlying

Viper

Writer

Arrangers

Barrier

Cantankerous

Dermatologist

Erased

Flounder

Grover

Harrier

Jumpers

Kipper

Levirate

Merits

Napeerian (as in John Naper)

Operational

Percussionist