against the wind vs into the wind

against the wind and into the wind both are adverbs.

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

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

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

Other synonyms of against the wind include upwind.

against the wind (adverb)	into 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