lecturer; public speaker
Refers to a person who gives lectures or speeches, often professionally. Can be used for both academic and motivational speakers.
He travels the world as a famous lecturer.
To become a public speaker, you need not only speaking skills but also expertise.
演説家 leans toward political or formal oratory, whereas 講演家 covers a broader range of lecture-style speaking, including educational and motivational talks.
Compound of 講演 (lecture, speech) and 家 (suffix for a specialist or professional). The word follows a common pattern for occupational nouns in Japanese.