initialism = an abbreviation pronounced wholly or partly using the names of its constituent letters, e.g., CD = compact disc, pronounced cee dee
pseudo-blend = an abbreviation whose extra or omitted letters mean that it cannot stand as a true acronym, initialism, or portmanteau (a word formed by combining two or more words).
FAADEZ – (i) Forward Area Air Defence Engagement Zone
FAAN – (i) Fellow of the American Academy of Neurology
FAAFP – (i)Fellow of the American Academy of Family Physicians
FAAN – (i) Fellow of the American Academy of Nursing
FAANG – Facebook, Amazon, Apple, Netflix, Google (the leading stocks in the late-2010s US market rally) (c.f. FANG, which originally did not include Apple)
FAAQ – (a/i) Frequently Asked and Anticipated Questions (cf. FAQ)
FAASV – (i) Field Artillery Ammunition Supply Vehicle
FAB – (i) Feline Advisory Bureau (UK feline charity)
Federatie Eredivisie Basketball (Dutch, "Federation Honorary Division (of) Basketball"), the former name of the basketball competition later known in Dutch by the English-language Dutch Basketball League
FILA – (a) Fédération internationale des luttes associées (French, "International Federation of Associated Wrestling Styles"), former name of the sport governing body now known as United World Wrestling
Also Funny-Looking Kid, a medical initialism for a young child with a mostly normal but somewhat unusual ("funny") appearance that raises the suspicion index for congenital disorder. Used only before a medical diagnosis has determined the cause of the unusual appearance.
(i) Federal'naya Sluzhba Bezopasnosti Rossiyskoi Federatsii (Федера́льная слу́жба безопа́сности Росси́йской Федера́ции, Russian "Federal Security Service of the Russian Federation", succeeded the FSK in 1995)