The initial idioms of the letter F

first mortgage	first name
first of all	First of May
First of October Antifascist Resistance Group	first off
first offender	first period
first person	first principle
first quarter	first reading
first rudiment	first sacker
first sergeant	First State
first step	first stomach
first strike	first team
first trimester	First Vatican Council
First Viscount Haldane of Cloan	First Viscount Nuffield
first visual area	first water
first-aid kit	first-aid station
firstborn	first-class