into the wind vs against the wind

into the wind and against the wind both are adverbs.

Word	Noun	Adjective	Verb	Adverb
into the wind	No	No	No	Yes
against the wind	No	No	No	Yes

As adverbs, into the wind and against the wind are synonyms defined as:

into the wind and against the wind: in the direction opposite to the direction the wind is blowing

Other synonyms of into the wind include upwind.

into the wind (adverb)	against the wind (adverb)
in the direction opposite to the direction the wind is blowing	in the direction opposite to the direction the wind is blowing