A-W of words containing letters "er" anywhere in the word (Part 2)

Remainder

Sender

Tighter

Umber

Vespers

Wintering

Burner

Should be letter β€œA” !
Alerted

Oops!
Coroner

Dunderheads (like me!)

Esperanto

Frolicker

Goalkeeper

Hibernating

Impersonating

Jitters

Klinker

Londoner

Masterful

Nervously