Beat verb - To move or cause to move with a striking motion.
Usage example: the bird's wings beat strongly as it soared in the air
Flap is a synonym for beat in repetition topic. In some cases you can use "Flap" instead a verb "Beat", when it comes to topics like throb. popular alternative
Flap verb - To move or cause to move with a striking motion.
Usage example: the stirring sight of a huge flock of geese flapping their wings
Beat is a synonym for flap in flutter topic. You can use "Beat" instead the word "Flap" as a verb or a noun, if it concerns topics such as repetition, hit. popular alternative
Both words in one sentence
- Snap Back: Lampshaded here◊: "It's great how you can beat someone up in a comic strip, then they get better the minute you leave." Soul Brotha: Lieutenant Flap, when he was introduced in the seventies.
Source: Comic Strip / Beetle Bailey
Google Ngram Viewer shows how "beat" and "flap" have occurred on timeline