Not generally, no. If you increase the pressure, the temperature, change phase, you can get some fluid-like behavior.
A fluid is NOT a solid. A fluid is a type of matter that flows. A fluid is liquid and gases.
liquid nitrogen is probably a fluid.
a solid, It does not exhibit the properties of a liquid at rest. A substance that acts like a liquid and a solid is called a non-newtonian fluid
Quicksand is a non-Newtonian fluid, which means it can behave like both a solid and a liquid. It appears solid until pressure is applied, causing it to behave like a liquid and trap objects within it.
Goobleck acts both as a liquid and as a solid.
water can be a liquid and also a solid when frozen
Ooblek is a non-Newtonian fluid, meaning that it can behave as both a liquid and a solid depending on the force applied to it. It flows like a liquid under low stress but can harden and resist force like a solid under high stress.
Lava is a liquid. It is molten rock that flows like a thick fluid when erupted from a volcano.
No. However, there are substances that don't fit neatly into a solid/liquid dichotomy. Glasses, for example, are much more like solids than they are like liquids, but they do have some liquid-like characteristics. Liquid crystals are liquids that show some solid-like characteristics. Viscoelastic materials (Silly Putty is probably the best known example) are somewhere in between.
A superficial fluid is when the gas, liquid, and solid are one.
Grain of solid suspense in air or liquid stream would behave like a fluid, you will find many of these phenomenon using the key word "Fluidized Bed".
liquid and gas because they both have an ability to flow