'Stretched water' - as weird as it sounds, is a real mainstream property of water, one which could explain some of the thermal anomalies that are lumped under the category of LENR.
https://www.nist.gov/publications/static-and-dynamic-properties-stretched-water https://www.science.org/doi/10.1126/science.290.5493.950 The extra reactivity of stretched water is due to temporarily elongated bonds. The nucleus of atoms is not suspected to be involved. One place that a small thermal anomaly could show up is in cavitation devices such as the Griggs pump. In some cases like cavitation, it seems certain that there is a small amount of anomalous energy involved with stretched water - if so, then where is the excess coming from? ZPE?