There are several synonyms for the term "native speech," which refers to the language spoken by someone from birth or as their first language. Some synonyms for this term include "mother tongue," "first language," "primary language," and "native tongue." Each of these terms describes the same concept of an individual's language proficiency in their first language. They are used interchangeably, depending on the context and preference of the speaker. It's important to note that for people who have more than one first language, there may be multiple native speeches or mother tongues to consider. Overall, these terms are all intended to describe the language that one is most proficient in.