There are various synonyms for the word "spot-announcement" that can be used to convey a similar meaning. One such synonym is "commercial," which refers to a promotional message that is broadcasted on television, radio, or other media. Another similar word is "advertisement," which is a notice or announcement that aims to promote a product or service. Other synonyms for "spot-announcement" include "promo," "ad" or "teaser," which are all commonly used in the advertising industry. All in all, these terms represent the same concept, namely, a brief message used to promote or advertise a product or service to potential consumers.