abreast vs au courant

abreast and au courant both are adjectives.

Word	Noun	Adjective	Verb	Adverb
abreast	No	Yes	No	Yes
au courant	No	Yes	No	No

As adjectives, abreast and au courant are synonyms defined as:

abreast and au courant: being up to particular standard or level especially in being up to date in knowledge

Other synonyms of abreast include au fait, up on.

abreast (adjective)	au courant (adjective)
being up to particular standard or level especially in being up to date in knowledge	being up to particular standard or level especially in being up to date in knowledge

abreast (adverb)	au courant (adverb)
alongside each other, facing in the same direction