There isn't a single specific term for when you put two solids or a solid and a liquid together. The most accurate description depends on what happens when you combine them:

If they mix:

* Mixture: This is a general term for a combination of two or more substances where each substance retains its own properties.

* Solution: A homogeneous mixture where one substance (solute) is dissolved completely into another substance (solvent). Examples: salt dissolving in water, sugar dissolving in coffee.

* Suspension: A heterogeneous mixture where particles of one substance are suspended in another but don't dissolve completely. Examples: sand in water, flour in water.

* Colloid: A heterogeneous mixture where particles are dispersed throughout a medium but are larger than in a solution. Examples: milk, fog.

If they react:

* Chemical reaction: This happens when the substances combine and form new substances with different properties. Examples: iron reacting with oxygen to form rust, baking soda reacting with vinegar to produce carbon dioxide.

If they don't mix or react:

* Heterogeneous mixture: The substances remain separate and distinct. Examples: sand and water, oil and water.

Other possibilities:

* Adhesion: When two different substances stick together. This can happen between a solid and a liquid. Example: water sticking to glass.

* Cohesion: When two substances of the same type stick together. Example: water molecules sticking to each other.

So, the best term to use depends on the specific situation and what you are trying to describe.