Chalkier

2 clues
More like messy blackboards
Like powdered milk compared with whole milk
Similar answers:
Abrainchallenge
Alpinechalet
Alpineskier
Arsenichall
Balkier
Bauschalomb
Beachalbum
Bulkier
Cachalot
Cachalots
Cakier
Catchall
Catchaluckybreak
Chalamet
Chalcidian
Chalco
Chalcolite
Chaldee
Chaldees
Chaler