Words

Arabic
fāˀiq- - place where the head is connected to the neck (BK 2 648)
Arabic
faˀr- - mouse (BK 2 529, Lane 2324)
Arabic
faˀs- - axe, adze (BK 2 529, Lane 3252)
Arabic
fiˀat- - troop (of men) (BK 2 531)

Can be compared to *piˀ(-­at-), but the meaning shift is not entirely clear. [Nöldeke 152] translated it as ‘troop, new army’ with a remark: «Originally there was probably something like ‘attack frontage’».

Arabic
fˀw - to split, to cleave (Lane 2326)
Arabic
faˀwā- - glans penis (BK 2 531)
Arabic
faˁfaˁ- - chevreau (kid) (BK 2 614)
Arabic
fˁl - to do; to make (Lane 2420)
Arabic
fˁm - to be full (of forearm, vessel); to be full-formed, thick (of woman) (BK 2 615, Lane 2421)

probably related

Arabic
faḥl- - stallion, male animal used for fecundation (BK 2 549, Lane 2345)