Fall to and Take the bull by the horns

Fall to verb - To take the first step in (a process or course of action).

Take the bull by the horns and fall to are semantically related. In some cases you can use "Take the bull by the horns" instead a verb "Fall to".

Take the bull by the horns verb - Face a difficulty and grapple with it without avoiding it.

Fall to and take the bull by the horns are semantically related. Sometimes you can use "Fall to" instead a verb phrase "Take the bull by the horns".