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"furthermore" is also used as a crossword clue. If that's what you saw, the answer is often moreover (8 letters).
Definitions
denoting additional information
Word origin
From Middle English furthermore, forthermore, forthermar (also as forther mo), equivalent to further + -more.
Used in a sentence
“He skillfully took charge of the event, and furthermore, he stayed late after it to clean up.”
“He claimed further(more) that he was not even in town the day the murder occured.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“In addition; moreover”11 letters
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