In piano music there's the technique called blind octaves where you create a rumbling melody over three octaves by playing the melody itself with the thumbs of your left and right hands alternatively, each octaved with the fourth or fifth fingers. I am looking for the word to describe the equivalent, but with whole chords. That can either stay with the same chord throughout the passage: Or it can form a quasi-melody: Sometimes one hand plays octaves and the other chords: What is the general term for this technique, if there is one?
When it just rhythmically articulating a chord tremolo or shake seems appropriate terms.
But when the tones move it seems there is a question of if there is a hand position change - in which case tremolo/shake simply isn't the technique - or if there is bona fide harmonic/melodic movement - in which case the passage isn't a mere ornament.
Bravura seem appropriate, but a bit generic.
From Mason's Touch and Technic...
For the chord based passages with some movement I suppose you can adapt Mason's wording and call it interlocking chords. Interlocking being understood to mean the distribution of the rhythm evenly between the two hands.
Looking around at some other method books, I found this convenient summary...
- Cisler, Technique for the Advancing Pianist: An Essential Collection of Progressive Exercises and Etudes
That provides alternating hands and linked trills as additional terms.