| FEARNAUGHT | • fearnaught n. A fearless person. • fearnaught n. A stout woolen cloth of great thickness; dreadnought.
 • fearnaught n. (By extension) A warm garment, especially one made of this cloth.
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| FEARNAUGHTS | • fearnaughts n. Plural of fearnaught. • FEARNAUGHT n. a thick cloth used for overcoats etc., also FEARNOUGHT.
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| FOUNTAINHEAD | • fountainhead n. A spring that is the source of a river. • fountainhead n. An abundant source of knowledge, etc.
 • FOUNTAINHEAD n. a spring that is the source of a stream.
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| FOUNTAINHEADS | • fountainheads n. Plural of fountainhead. • FOUNTAINHEAD n. a spring that is the source of a stream.
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| HERPETOFAUNA | • herpetofauna n. Reptiles and amphibians as a group, especially those of a particular region or time period. • HERPETOFAUNA n. (Latin) snake life.
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| HERPETOFAUNAE | • HERPETOFAUNA n. (Latin) snake life. | 
| HERPETOFAUNAS | • herpetofaunas n. Plural of herpetofauna. • HERPETOFAUNA n. (Latin) snake life.
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| ICHTHYOFAUNA | • ichthyofauna n. The fish of a particular region. • ICHTHYOFAUNA n. the fish life of region.
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| ICHTHYOFAUNAE | • ichthyofaunae n. Plural of ichthyofauna. • ICHTHYOFAUNA n. the fish life of region.
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| ICHTHYOFAUNAL | • ichthyofaunal adj. Relating to ichthyofauna. • ICHTHYOFAUNAL adj. of or relating to ichthyofauna.
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| ICHTHYOFAUNAS | • ichthyofaunas n. Plural of ichthyofauna. • ICHTHYOFAUNA n. the fish life of region.
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| SULFAMETHAZINE | • sulfamethazine n. Sulfadimidine. • SULFAMETHAZINE n. an American name for sulfadimidine, a white odourless crystalline compound formerly used in medicine in the treatment of bacterial infections.
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| SULFAMETHAZINES | • SULFAMETHAZINE n. an American name for sulfadimidine, a white odourless crystalline compound formerly used in medicine in the treatment of bacterial infections. | 
| TETRAHYDROFURAN | • tetrahydrofuran n. (Organic chemistry) A heterocyclic ether having a five-membered ring with four carbon atoms and one… • TETRAHYDROFURAN n. a flammable liquid ether derived from furan and used as a solvent and as an intermediate in organic synthesis.
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| UNFATHOMABLE | • unfathomable adj. Impossible to fathom or understand. • unfathomable adj. Difficult to penetrate.
 • UNFATHOMABLE adj. not capable of being fathomed.
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| UNFATHOMABLY | • unfathomably adv. In an unfathomable manner; beyond understanding. • UNFATHOMABLE adv. not capable of being fathomed.
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