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

[Cardigan]

chirps

[burpo_the_wonder_mutt]

spring

[panache45]

ringer

[Ignatz]

ginger

[burpo_the_wonder_mutt]

rigged

[panache45]

degree

[Cardigan]

dredge

ever notice how sometimes a word occurs instantly and others it takes quite a while?

[Prof.Pepperwinkle]

[Oooooooh, yeah.]

welder

[panache45]

[Oh, definitely.]

elders

[Ignatz]

slider

[panache45]

redial

[Ignatz]

direct

[burpo_the_wonder_mutt]

insect

[panache45]

sector

[Cardigan]

crater

[Prof.Pepperwinkle]

curate

[burpo_the_wonder_mutt]

target

[panache45]

regret

[Cardigan]

grater

[Prof.Pepperwinkle]

varlet