| es | de | en | fr | it | pt | 
| Fachada (f) | Fassade (f) | Facade | Façade (f) | Facciata (f) |  | 
| Falleba (f) | Espagnolette (f) / Drehstangenverschluss (m) /  Ruderstange (f) | Espagnolette / Crémone | Espagnolette (f) / Crémone (f) | Spagnoletta |  | 
| Faltante (m) | Fehler (m) | Error | Erreur (f) | Errore (m) |  | 
| Fascia (f) | Faszie (f) | Fascia | Fascia (m) | Fascia (f) |  | 
| Fascículo (m) | Fasche (f) | Fasche / Fascicle | Fascicule (m) | Fascicolo (m) |  | 
| Feldespato (m) | Feldspat (m) | Feldspar | Feldspath (m) | Feldspato (m) |  | 
| Feldspato alcalino (m) | Alkalifeldspat (m) | Alkali feldpsar | Feldspath potassique (m) | Feldspato potassico (m) |  | 
| Feria comercial (f) | Fachmesse (f) | Trade show / Trade fair | Foire commerciale (f) | Fiera specializzata (f) |  | 
| Festón (m) | Feston (m) / Girlande (f) | Festoon | Feston (m) | Festone (m) |  | 
| Fibra (f) | Faser (f) | Fibre | Fibre (f) | Fibra (f) |  | 
| Fibra de madera (f) | Holzfaser (f) | Wood fibre | Fibre de bois (f) | Fibra di legno (f) |  | 
| Fibra de vidrio (f) / Fibra óptica (f) | Glasfaser (f) | Fibre glass / Glass fibre / Fiberglass / Fibre optic | Fibre de verre (f) / Fibre optique (f) | Fibra di vetro (f) / Vetroresina |  | 
| Fijación (f) | Befestigung (f) | Attachment | Fixation (f) | Fissago (m) |  | 
| Fijador (m) / Agente de fijación (m) | Fixativ (nt) / Fixiermittel (nt) | Fixative | Fixatif (m)  / Agent fixatif (m) | Fissativo (m) |  | 
| Fisura delgada (f) / Fisura muy fina (f) | Haarriss (m) | Hairline crack / Hairline fracture | Fissure capillaire (f) / Fendilles (f.pl) | Fessure (f.pl) / Crepa dell'attaccatura dei capelli |  | 
| Flauta (f) / Estria (f) | Kannelierung (f) / Kannelüre (f) | Flute / Fluting | Flûte (f) / Cannelure (f) | Flauto (m) |  | 
| Floron (m) / Flor crucífera (f) | Kreuzblume (f) | Cross flower / Finial | Fleur crucifère (f) / Fleuron (m) | Fiore delle crocifere |  | 
| Fluorita (f) | Fluorit (nt) / Flussspat (m) | Fluorite | Fluorite (f) | Fluorite (f) |  | 
| Foca (f) | Dichtung (f) | Seal | Joint (m) | Guarnizione (f) |  | 
| Forma (f) / Figura (f) | Gestalt (f) | Shape / Stature | Figure (f) Personnage (m) | Sagoma |  | 
| Formación de burbujas (f) | Blasenbildung (f) | Blistering | Formation de bulles (f) | Formazione di bolle (f) |  | 
| Forro (m) | Futter (nt) | Lining | Doublure (f) | Fodera (f) |  | 
| Fracción (f) | Anteil (m) | Proportion | Fraction (f) | Parte (f) |  | 
| Fraguar | Abbinden (v) | Set | Endurcer | Consolidarsi |  | 
| Fresco en el techo (m) | Deckengemälde (nt) | Ceiling fresco | Plafond (m) | Dipinto sul soffitto (m) |  | 
| Fresno (m) | Esche (f) | Ash | Frêne (m) | Cenere (f) / Frassino (m) |  | 
| Friso | Vertikalfries (m) | Vertical frieze | Frise | Fregio |  | 
| Friso (m) | Fries (m) | Frieze | Frise (f) | Fregio |  | 
| Friso de la cruz del medio (m) | Mittleres Querfries (nt) | Middle cross frieze | Frise centrale en croix (f) | Fregio centrale a croce (m) | Friso cruzado médio (m) | 
| Friso del techo (m) / Moldura (f) | Deckenfries (m) | Ceiling frieze / Moulding | Frise de plafond (f) | Fregio a soffitto |  | 
| Frontón (m) | Giebel (m) | Gable/Pediment | Pignon (m)/ Fronton (m) | Timpano (m) / Frontone (m) |  | 
| Fucsina (f) | Anilinrot (nt) | Magenta | Magenta (f) | Fucsina |  | 
| Fuga (f) / Junta (f) | Fuge (f) | Gap / Groove / Seam / Joint / Grout line | Fugue (f) / Emboîture (f) / Joint (m) | Fuga (f) / Crepa (f) / Fessura (f) |  | 
| Funcionamiento (m) / Empresa (f) / Servicio (m) | Betrieb (m) | Operation / Enterprise / Company / Business / Plant | Fonctionnement (m) / Entreprise (f) / Exploitation (f) | Operazione (f) / Azione (f) / Funzionamento (m) | Funcionamento (m) / Empresa (f) / Serviço (m) | 
| Funda (f) / Tejido de cubierta | Bezugstoff (m) / Polsterstoff (m) | Cover fabric / Covering / Upholstery | Housse (f) / Tissu de revêtement | Ricoperta di stoffa (f) |  | 
| Fundición (f) | Giesserei (f) / Gusswerk (nt) | Foundry | Fonderie (f) | Fonderia (f) |  | 
| Fundición (f) / Molde (m) | Guss (m) | Cast | Coulée (f) / Fonte (f) / Fonderie (f) | Colata (f) / Diluvio (m) |  | 
| Fungicida (m) | Fungizid (nt) | Fungicide | Fongicide (m) | Fungicida (m) |  | 
| Fórmula (f) | Formel (f) | Formula | Formule (f) | Formula (f) |  | 
| f) , Abedul (m) (Madera de abedul | Birke (f) / Birkenholz (nt) | Birch | Bouleau (m) (Bois de bouleau, m) | Betulla (Legno di betulla, m) |  | 
| fijo (m), Carril guía | Führungsschiene (fest) (f) | Guide rail, fixed | Rail de guidage fixe (m) | Binario di guida, fisso |  | 
| firme de hormigón | Betondecke | concrete ceiling | plafond au béton | copertura in calcestruzzo |  | 
| fluir | fließen (v) | flow | couler | scorrere |  | 
| fondo | Unterlagsboden | ground / floor | fond / radier | terreno / pavimento |  | 
| formar | ausbilden (Risse, Beulen)  (v) | form | former | formare |  | 
| formar burbujas | blasen bilden (v) | bubble (form) | former des bulles | fare le bolle |  | 
| forro (m), encofrado (m) / revestimiento (m) | Schalung (f), Überzug (m) | boarding / formwork / shutter, casing / coating / cover / overlay | coffrage (m), 	recouvrement (m) / housse (f) | cassaforma (f) / cassero (m), copertura (f) / fodera (f) |  | 
| foso del castillo | Burggraben | castle moat | fossé m. | fossato |  | 
| franja | Schlagleiste | baffle plate | moulure, liston | listello |  | 
| frente | Stirnseite | front side | front | facciata |  | 
| fronton blindado | Stirndreieck | gable sheeting | Revêtements du fronton | rivestimento del frontone |  | 
| fuga (f) / junta (f) | Standfuge | gap / groove | fugue (f) / emboîture (f) / joint (m) | fuga (f) / crepa (f) / fessura (f) |  | 
| fuga (f) / junta (f) | Sandfuge | gap / groove | fugue (f) / emboîture (f) /  joint (m) | fuga (f) / crepa (f) / fessura (f) |  | 
| fumigar | ausräuchern (v) | fumigate | fumiger | sterminare col fumo |  |