Synonyms of the word

well-known

• adj. Familiar, famous, renowned or widely known.
• adj. (computing, not comparable) Generally recognised; reserved for some usual purpose.

familiar

• adj. Known to one.
• adj. Acquainted.
• adj. Intimate or friendly.
• adj. Inappropriately intimate or friendly.
• adj. Of or pertaining to a family; familial.
• n. (obsolete) A member of one's family or household.
• n. (obsolete) A close friend.
• n. An attendant spirit, often in animal form.

known

• adj. Identified as a specific type; renowned, famous.
• adj. Researched, accepted, familiar.
• n. (algebra) A variable or constant whose value is already determined.
• n. Any fact or situation which is known or familiar.
• v. past participle of know.