What's the difference between northeastward and northeastwards?

Northeastward

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Definition:

• (adv.) Alt. of Northeastwardly

Example Sentences:

• (1) Larviciding of potential source breeding sites has shown that these 'savanna' species are capable of travelling and carrying Onchocerca infection for at least 500 km northeastwards with the monsoon winds in the early rainy season.

Northeastwards

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Definition:

Example Sentences:

• (1) Larviciding of potential source breeding sites has shown that these 'savanna' species are capable of travelling and carrying Onchocerca infection for at least 500 km northeastwards with the monsoon winds in the early rainy season.