Circumflex and Diacritical mark

Circumflex noun - A diacritical mark (^) placed above a vowel in some languages to indicate a special phonetic quality.

Diacritical mark and circumflex are semantically related. In some cases you can use "Diacritical mark" instead a noun "Circumflex".

Diacritical mark noun - A mark added to a letter to indicate a special pronunciation.

Circumflex and diacritical mark are semantically related. Sometimes you can replace term "Circumflex" with "Diacritical mark", this terms are similar.