| BIOFOULERS | • biofoulers n. Plural of biofouler. • BIOFOULER n. an animal that obstructs or corrupts the environment. |
| FETOLOGIES | • FETOLOGY n. a branch of medicine dealing with the fetus. |
| FETOLOGIST | • fetologist n. One who studies fetology. • FETOLOGIST n. one who studies the fetus. |
| FIELDBOOTS | • fieldboots n. Plural of fieldboot. • field␣boots n. Plural of field boot. • FIELDBOOT n. a knee-length boot. |
| FIREFLOODS | • FIREFLOOD n. a method of extracting oil from a well by burning some of the oil to increase the flow. |
| FLOODTIDES | • floodtides n. Plural of floodtide. • flood-tides n. Plural of flood-tide. • flood␣tides n. Plural of flood tide. |
| FLORIDEOUS | • florideous adj. Synonym of floridean. • FLORIDEOUS adj. relating to Floridae, a family of red seaweeds. |
| FOILSWOMEN | • FOILSWOMAN n. a woman who uses or specializes in using a foil. |
| FOISONLESS | • foisonless adj. Alternative form of fizzenless. • FOISONLESS adj. (Scots) weak, feeble, also FIZZENLESS, FUSHIONLESS, FUSIONLESS. |
| FOLIACEOUS | • foliaceous adj. Resembling a leaf or leaves. • foliaceous adj. Bearing leaves. • FOLIACEOUS adj. bearing leaves; leaflike. |
| FOOLFISHES | • foolfishes n. Plural of foolfish. • FOOLFISH n. a marine fish, the orange filefish. |
| FOOLISHEST | • foolishest adj. Superlative form of foolish: most foolish. • FOOLISH adj. lacking good sense or judgement. |
| FORSLOEING | • FORSLOE v. (Shakespeare) to delay, also FORSLOW, FORESLOW. |
| FROLICSOME | • frolicsome adj. Characterised or marked by frolicking; playful. • FROLICSOME adj. given to pranks; sportive. |
| ISOFLAVONE | • isoflavone n. (Organic chemistry) Any of a class of polyphenolic phytoestrogens found in soybeans and similar plants… • ISOFLAVONE n. a plant oestrogen, found esp. in soy beans, having possible nutritional benefits. |
| LIFEBLOODS | • lifebloods n. Plural of lifeblood. • LIFEBLOOD n. the blood necessary to life. |
| OLEIFEROUS | • oleiferous adj. That produces oil. • OLEIFEROUS adj. producing oil. |
| SINGLEFOOT | • singlefoot n. A horse’s gait, a cross between a pace and a trot, in which the two legs of one side are raised almost… • singlefoot v. (Intransitive) To proceed by means of the singlefoot gait. |
| SOLFEGGIOS | • solfeggios n. Plural of solfeggio. • SOLFEGGIO n. a singing exercise using the syllable do, re, mi, fa, so, la, ti, also SOLFEGE. |
| SOLFERINOS | • solferinos n. Plural of solferino. • SOLFERINO n. (Italian) a moderate purplish-red. |