What is another word for be of opinion?
Pronunciation: [biː ɒv əpˈɪni͡ən] (IPA) 
The phrase "be of opinion" can also be substituted with a number of synonyms depending on the context it is being used. One such phrase could be "believe" which could indicate a personal feeling or conviction. Another synonym could be "think" which could express one's perception or judgment of a situation. "Hold" is another term that is often used interchangeably and indicates a strong conviction and belief in something. "Be convinced" could also be used, showing a level of certainty and conviction in one's opinion. Other synonyms that could be used include "consider," "regard," and "deem," all of which suggest a certain level of thought and judgment.
