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Obsidian vs Fu - What's the difference?

obsidian | fu |

As nouns the difference between obsidian and fu

is that obsidian is a type of black glass produced by volcanoes while fu is flux unit.

As an adjective obsidian

is black.

As an interjection fu is

fuck you.

As a proper noun Fu is

{{surname|Chinese|from=Chinese}.

As an initialism FU is

follow-up.

obsidian

English

Noun

(en-noun)
  • (mineral) a type of black glass produced by volcanoes

    • Adjective

    (en adjective)
  • (poetic) black

    • fu

    English

    Etymology 1

    From .

    Interjection

    (en interjection)
  • (Internet, slang) fuck you
    • Related terms
    * -fu

    Etymology 2

    * Abbreviation

    Noun

    (en noun)
  • flux unit
    • ----