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

Versatile

Werewolf

Xeric

Yesteryear

Averse
(W is the last word in the sequence)

So it is :upside_down_face:

Berserk

Cereal

Dover

Ergonomic

Father

Geronimo

Hoovered

Informer

Joker

Kernel

Learner

Mercury

Newsreader

Otter

Piper