Phase and faze are homophones (words pronounced alike but different in meaning, derivation, or spelling) that may easily be confused. A phase is one of the forms in which matter can exist, such as solid, liquid, or a gas. Definition of phase noun in oxford advanced learner's dictionary.
There were two phases to the resolution; His immaturity was a passing phase. There were two phases to the resolution, his immaturity was a passing phase
Phase generally refers to a distinct stage or period in a process of change or development. Factsheet what does the noun phase mean? There are seven meanings listed in oed's entry for the noun phase.
See examples of phase used in a sentence.