Northward means towards the colder half of the world. Head northward, the northward journey, northward migration.
Northwards with the s is the commoner adverb in Britain, and northward the adjective. A northward-facing wall in the northern hemisphere never sees the sun, which is why moss grows there.
1adverbnorthwardTowards the colder half of the world.
“From the port, the coast road runs northward for fifty miles.”
northward is a direction.
Middle English
north
English
north
English, today
northward
From north + -ward. north comes from Middle English north. From Middle English north, from Old English norþ, from Proto-West Germanic norþr, from Proto-Germanic nurþrą, ultimately from Proto-Indo-European nér (“below (the surface)”). The meaning developed either from "region where the sun is below (the earth)" or from "left side of someone who turns to the east when praying". 2
Etymology from Wiktionary, CC BY-SA