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There are 4 words beginning with UROBI

UROBILIN	• urobilin n. (Biochemistry) A yellow linear tetrapyrrole resulting from the breakdown of heme, produced when urobilinogen… • UROBILIN n. a brown pigment in faeces and sometimes urine.
UROBILINOGEN	• urobilinogen n. (Biochemistry) A colourless product of bilirubin reduction, formed in the intestines by bacterial action. • UROBILINOGEN n. any of a group of colourless tetrapyrrole compounds produced by the reduction of bilirubin.
UROBILINOGENS	• UROBILINOGEN n. any of a group of colourless tetrapyrrole compounds produced by the reduction of bilirubin.
UROBILINS	• urobilins n. Plural of urobilin. • UROBILIN n. a brown pigment in faeces and sometimes urine.

Scrabble words — in black are valid world wide — in RED are not valid in North America — in GREEN are valid only in North America.
Definitions are short excerpt from the 1Word.ws and WikWik.org.

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English Wiktionary: 10 words
Scrabble in French: 6 words
Scrabble in Spanish: no word
Scrabble in Italian: 4 words
Scrabble in German: no word
Scrabble in Romanian: 7 words

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