Binary and Two

Binary noun - A system of two stars that revolve around each other under their mutual gravitation.

Two and binary are semantically related In some cases you can use "Two" instead the word "Binary" as a noun or an adjective.

Two noun - The cardinal number that is the sum of one and one or a numeral representing this number.

Binary and two are semantically related in two of something topic. You can use "Binary" instead the word "Two" as a noun or an adjective, if it concerns topics such as having two of something.