Orderly
Systematic, Well Organized, Natural Order
adjective, adverb
せいぜん
整然 (せいぜん) Orderly, Systematic, Well Organized, Natural Order
体系的 (たいけいてき) Systematic
秩序 (ちつじょ) Order, Regularity, System, Method
当然 (とうぜん) Natural, Obvious
然 tends to make things adverbs.