Seven-letter words - change zero to two letters to make a new word (Part 1)

noggins

signing

singing

gushing

Higgins

gigging
Sorry, it is in Merriam Websters.

gagging!

ageings

ageing is a spelling variant. It does hurt my eyes.

engines

ingests

digests

diecast

studied

muddied

muddles

huddles

shudder

shunter

thrones

shorted