opinion vs thought

opinion and thought both are nouns.

Word	Noun	Adjective	Verb	Adverb
opinion	Yes	No	No	No
thought	Yes	No	No	No

As nouns, opinion and thought are synonyms defined as:

opinion and thought: a personal belief or judgment that is not founded on proof or certainty

Other synonyms of opinion include persuasion, sentiment, view.

As nouns, thought is a hypernym of opinion; that is, thought is a word with a broader meaning than opinion:

Other hypernyms of opinion include idea.

opinion (noun)	thought (noun)
the reason for a court's judgment (as opposed to the decision itself)	the process of using your mind to consider something carefully
a personal belief or judgment that is not founded on proof or certainty	the content of cognition; the main thing you are thinking about
a belief or sentiment shared by most people; the voice of the people	the organized beliefs of a period or group or individual
a vague idea in which some confidence is placed	a personal belief or judgment that is not founded on proof or certainty
the legal document stating the reasons for a judicial decision
a message expressing a belief about something; the expression of a belief that is held with confidence but not substantiated by positive knowledge or proof