Name of device for when a verb ESPECIALLY matches the rest of the sentence
Solution 1:
I agree with @Rob_Star that the example quoted is not particularly original. But if it were, I would not regard it as a literary device — just good or original writing style. To describe it I would use the adjective apposite, e.g.
“The use of the word ‘splash’ was particularly apposite (because…)”
An Oxford Dictionary definition is
apposite
ADJECTIVE
Apt in the circumstances or in relation to something.
‘an apposite quotation’
The reason I suggest this adjective (rather than just ‘apt’) is that it embodies the idea of being appropriate to the circumstances.