共に

The word 共に can be used with nouns as the more formal version of も. When used in the format [X, Y 共に], it translates as "both X and Y."

今年の冬は、一月、二月共、あまり寒くなかった。
This winter in both January and February, it wasn't very cold.

リーさんが家で犬、猫共にが飼ってるってけど、そこで馬も見たんだな。
Lee-san says he has both dogs and cats at his house, but I also saw horses there.

毎年、夏、冬共に祖父母の家で休みを楽しむことにしている。
I'm in the habit of enjoying a vacation at my grandparents' house every summer and winter.

アリスがパーティーにチップス、サルサ共に持ってこなくちゃと言ってた。
Alice told me to bring both chips and salsa for the party.