Downward-Downwards | Commonly Confused Words

Downward

/ˈdaʊnwəd/

Moving from a higher to a lower position or level

The kite swooped downward past the tall trees.She focused her gaze downward on the busy street.Rain poured downward, soaking everyone outside.

/ˈdaʊnwədz/

Moving towards a lower position or level

The stream flows steadily downwards to the valley.He glanced downwards, avoiding her curious gaze.The path slopes downwards as it nears the lake.

Downward is used more commonly in American English, whereas downwards is often used in British English.
Both words describe a direction towards a lower position or level, so they are quite interchangeable in this sense.
Think of downward as the more straightforward and often formal option in various contexts.
Downwards can sometimes sound a bit more casual or conversational.
Remember, despite tiny regional preferences, the choice between them will almost always be understood regardless of which variation people use.