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

glacial

lethargic

Lethargic has eight letters

Playing off of glacial

facials

:man_facepalming:

fractal

frantic

fanfics

Frisian

surfing

griffon

foreign

reining

raining

gaining

Nailpin

explain

planets

scalper

percale

caliper

Lucifer