sort by Rank | Alpha
| Possible Meanings | Rank |
| Fire and Intrusion | **** |
| First Research Institute | **** |
| Free Roaming Idiots | **** |
| Fishery Research Institute | **** |
| Fully Repairing and Insuring | **** |
| Fermentation Research Institute | **** |
| Front Range Internet | *** |
| Family Resources International | *** |
| Forestry Research Institute | *** |
| Foundry Research Institute | *** |
| Foreign Relations Institute | *** |
| Forum Rektor Indonesia | *** |
| Febrile Respiratory Illness | *** |
| Full Repairing and Insuring lease | *** |
| Fondation Rurale Interjurassienne | *** |
| Family Research Initiative | *** |
| Feighner Research Institute | *** |
| Fondation Richelieu International | *** |
| Foot Rotation Indicator | *** |
| Fractionation Research Inc | *** |
| Ferguson Road Initiative | *** |
| Fashion Research Institute | *** |
| Fuchsia Research International | *** |
| Fund Request Information | *** |
| Forest Resource Inventory | *** |
| Flight Research Institute | *** |
| Family Resources Inc | *** |
| Florida Reading Initiative | *** |
| Federal Research Institute | *** |
| First Report of Injury | *** |
| Flood Risk Impact | *** |
| Forest Resources Inventory | *** |
| Fuel Research Institute | *** |
| Fire Return Interval | *** |
| Financial Research Initiative | *** |
| Focused Research Initiatives | ** |
| Fire Research Institute | ** |
| Family Relationship Index | ** |
| Family Relationships Inventory | ** |
| Family Routines Inventory | ** |
| febrile respiratory infection | ** |
| Fels Research Institute | ** |
| Fenton-reactive iron | ** |
| fetal rat islets | ** |
| Firesetting Risk Interview | ** |
| fluorosis risk index | ** |
| flux response index | ** |
| fragment recognition index | ** |
| Framingham risk index | ** |
| free-recall instruments | ** |
| Freeport Resources Inc | ** |
| Functional Rating Index | ** |
| First Responder Institute | ** |
| Financial Rehabilitation Inc | ** |
| Flux Reversals per Inch | ** |
| Freshman Research Initiative | ** |
| Frame Relay Interface | ** |
| Fanaroff-Riley type I | ** |
| Foundation for Realization of Ideas | ** |
| Fuerza Regional Independiente | ** |
| Florida Research Institute | ** |
| Fuerza de Reaccion Inmediata | ** |
| Filter Replacement Indicator | ** |
| Floor Restoration Inc | ** |
| Forest Research Insitute | ** |
| Fioravanti Redwood International | ** |
| Feather River Industries | ** |
| Financial Retention Incentive | ** |
| Flex Relax Intelligence | ** |
| Financial Regulation and Industry | ** |
| Final Random Inspections | ** |
| Forum of Indonesian | ** |
| Foundation for the Realization of Ideas | ** |
| Financial Regulation International | ** |
| Fodder Research Institute | ** |
| Ford Robertson Initiatives | ** |
| Freie Reifeneinkaufs Initiative | ** |
| Fisheries Reserch Institute | ** |
| Foundation for Research Innovation | ** |
| For Florida Reading Initiative | ** |
| Fractionation Research Institute | ** |
| Freedom Ranch Inc | ** |
| Frame Relay IGX | * |
| Filene Research Institute | * |
| Final Risk Index | * |
| Forum Rakyat Independen | * |
| Family Relationships Index | * |
| Feinmann Remodeling Inc | * |
| Fish Recruitment Index | * |
| Family Relations Inventory | * |
| Fonobono Research Institute | * |
| Farm and Ranch Irrigation | * |
| Frame Relay Internetworking | * |
| Federal Regulations Information | * |
| Farming Research Institute | * |
| Federal Register Identification | * |
| Final Reports Isotope | * |
| Flushing Rotary International | * |
| Forest Resources of Illinois | * |
| Forestry Resources on the International | * |
| Fredric Russell Investment | * |
| Freeman Resources Incorporated | * |
| Freemasonry Roger Ingersoll | * |
| Fuerza de Reacci=n Inmediata | * |