The definition of lava is hot molten or semifluid rock, and Ice (Glacier Ice) is considered a rock. Because, Glacier ice, in particular, is often classified as a metamorphic rock due to the changes it undergoes under pressure and heat. So, in that case, Water is lava.
Edited for more proof
Ice is a naturally occurring Inorganic solid with a definite composition and might have a crystal structure, that's what a mineral is. Ice also won the mineral of the year in 2019. Sources are Vsauce and ChatGPT