| DESULFURISATION | • DESULFURISATION n. the removal of sulfur or sulfur compounds (as from coal or flue gas), also DESULFURIZATION. | 
| DESULFURISING | • desulfurising v. Present participle of desulfurise. • DESULFURISE v. to remove the sulfur from a compound, also DESULFURIZE, DESULPHURISE, DESULPHURIZE.
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| FILIBUSTEROUS | • filibusterous adj. Filibustering. • FILIBUSTEROUS adj. like a filibuster.
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| FLORICULTURISTS | • floriculturists n. Plural of floriculturist. • FLORICULTURIST n. one who practises floriculture.
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| FULIGINOUSNESS | • FULIGINOUS n. sooty; having a dark or dusky color. | 
| FUSULINIDS | • fusulinids n. Plural of fusulinid. • FUSULINID n. any of a family of extinct marine foraminifera.
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| SPINULIFEROUS | • SPINULIFEROUS adj. bearing spinules. | 
| SULFURISATION | • SULFURISATION n. the process of sulfurising, also SULFURIZATION. | 
| SULFURISATIONS | • SULFURISATION n. the process of sulfurising, also SULFURIZATION. | 
| SULFURISING | • sulfurising v. Present participle of sulfurise. • SULFURISE v. to combine or impregnate with sulphur or any of its compounds, also SULFURIZE, SULPHURISE, SULPHURIZE.
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| SULFURIZATIONS | • sulfurizations n. Plural of sulfurization. • SULFURIZATION n. the process of treating with sulfur, also SULFURISATION.
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| SUPERFLUIDITIES | • superfluidities n. Plural of superfluidity. • SUPERFLUIDITY n. the state of being superfluid.
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| SUPERFLUITIES | • superfluities n. Plural of superfluity. • SUPERFLUITY n. excess.
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| ULTRAFASTIDIOUS | • ultrafastidious adj. Extremely fastidious. • ULTRAFASTIDIOUS adj. extremely fastidious.
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| UNFOSSILIFEROUS | • unfossiliferous adj. Not fossiliferous, nonfossiliferous. • UNFOSSILIFEROUS adj. not fossiliferous.
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| UNPITIFULNESS | • unpitifulness n. Quality of being unpitiful. • UNPITIFULNESS n. the state of being unpitiful.
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| UNPITIFULNESSES | • UNPITIFULNESS n. the state of being unpitiful. | 
| UNQUALIFIEDNESS | • unqualifiedness n. The state or condition of being unqualified. • UNQUALIFIEDNESS n. the state of being unqualified.
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