Melting
Part of speech: verb
Definition: To change (or to be changed) from a solid state to a liquid state, usually by a gradual heat.
Part of speech: noun
Definition: The process of changing the state of a substance from solid to liquid by heating it past its melting point
Example sentence: Some scientists believe climate change is the cause of unprecedented melting of the North Pole, and that effects these very uncertain weather patterns. I think we should listen to those scientists and experts.
Thawing
Part of speech: verb
Definition: To gradually melt, dissolve, or become fluid; to soften from frozen