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English Words Starting With F

5,868 entries — pick a word to see its definition, pronunciation, and usage.

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Noun Verb Adjective Adverb Plural noun Combining form Verb (transitive)Verb (intransitive)Verb (ambitransitive)

formula one
nounB2
/ˌfɔː.mjə.lə ˈwʌn/The highest class of international single-seater auto racing sanctioned by the Fédération Internationale de l'Automobile (FIA).
formula unit
nounC1/C2
/ˈfɔːmjʊlə ˈjuːnɪt/The simplest, lowest whole-number ratio of ions or atoms represented in an ionic compound's chemical formula.
formula weight
nounC1
/ˈfɔːmjʊlə weɪt/The sum of the atomic weights of all atoms in a chemical formula, expressed in atomic mass units (amu).
formularize
verbverb-transitiveC2/Rare
/ˈfɔː.mjə.lə.raɪz/To express or reduce something to a formula; to state in a systematic or formulaic manner.
formulary
adjectivenounC1
/ˈfɔːmjʊləri/An official list of approved medicines, formulas, or set forms.
formulate
verbverb-transitiveC1
/ˈfɔː.mjə.leɪt/to create or develop something carefully, especially a plan, idea, or statement, expressing it in a clear and systematic way.
formulism
nounC2 / Low-frequency / Academic / Formal
/ˈfɔː.mjə.lɪ.zəm/adherence to or reliance on formulas, especially in a rigid, unimaginative, or mechanical way.
formulize
verb-transitiveC2/Advanced. Rare in everyday speech; primarily used in academic, technical, business, or formal contexts.
/ˈfɔː.mjʊ.laɪz/to express or represent something in the form of a formula, systematic statement, or fixed method.
formwork
nounC2
/ˈfɔːm.wɜːk/A temporary structure used to support wet concrete while it sets and hardens into the desired shape.
formyl
adjectivenounC2
/ˈfɔːmʌɪl/The radical -CHO, derived from formic acid.
formyl group
nounSpecialized / Very Low Frequency
/ˈfɔːmɪl ˌɡruːp/A univalent chemical group (−CHO) derived from formic acid, consisting of a carbonyl center bonded to hydrogen.
formylate
verb-transitiveC2
/ˈfɔːmɪleɪt/To introduce a formyl group (CHO-) into a molecule.
fornax
nounExtremely Rare
/ˈfɔː.næks/An oven, furnace, or kiln; specifically, a small Roman furnace used for domestic purposes like baking or heating.
forney
nounLow
/ˈfɔːni/A surname or brand name of historical significance.
fornicate
verbverb-intransitiveLow
/ˈfɔː.nɪ.keɪt/To have sexual intercourse between two people who are not married to each other.
fornication
nounC2
/ˌfɔː.nɪˈkeɪ.ʃən/Sexual intercourse between two people who are not married to each other.
fornicator
nounLow
/ˈfɔː.nɪ.keɪ.tə/A person who engages in consensual sexual intercourse outside of marriage
fornicatrix
nounExtremely Rare
/ˌfɔː.nɪˈkeɪ.trɪks/A female who engages in fornication; a sexually promiscuous woman.
fornix
nounVery Low
/ˈfɔː.nɪks/An arch-shaped structure or band of nerve fibers in the brain.
forrel
nounExtremely Low / Obsolete
/ˈfɒrəl/No established standard English meaning. Possibly a rare or dialectal term for a type of fish (brown trout) or an archaic term for a wrapper/binding, but unconfirmed in standard modern dictionaries.

Showing 4101–4120 of 5868 words.