Answer:
antonym
Step-by-step explanation:
These words are all opposite one another. Antonyms are the words that oppose each other and have completely contrasting meanings to one another. Therefore, these words are antonyms.
Dissolve means for something to break up, and usually to become liquid. Solidify is the word that marks the process of something getting into the solid-state or hardening. These words therefore show the two completely opposing processes.
Noise is the loud or unpleasant sound, an unwanted one. Silence is the complete absence of any sound. Again, we see that these words describe the two contrasting states of sound.