preconception vs thought

preconception and thought both are nouns.

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

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

preconception: an opinion formed beforehand without adequate evidence
thought: a personal belief or judgment that is not founded on proof or certainty

Other hypernyms of preconception include opinion, persuasion, sentiment, view.

preconception (noun)	thought (noun)
an opinion formed beforehand without adequate evidence	the process of using your mind to consider something carefully
a partiality that prevents objective consideration of an issue or situation	the content of cognition; the main thing you are thinking about
	the organized beliefs of a period or group or individual
	a personal belief or judgment that is not founded on proof or certainty