Birth control device and Oral contraceptive

Birth control device noun - An agent or device intended to prevent conception.

Oral contraceptive and birth control device are semantically related. In some cases you can replace phrase "Oral contraceptive" with "Birth control device", this phrases are similar.

Oral contraceptive noun - A contraceptive in the form of a pill containing estrogen and progestin to inhibit ovulation and so prevent conception.

Birth control device and oral contraceptive are semantically related. You can use "Birth control device" instead a noun phrase "Oral contraceptive".