pericynthion /per-i-sinˈthi-ən/

• first principles
• first-rate
• first reading
• first refusal
• First Reich
• firsts
• first school
• first schools
• first storey
• first strike
• first-strike
• first strikes
• first supine
• first thing
• first-time
• first water
• First World
• first year allowance
• firth
• firths
• fir tree
• fir trees
• firwood
• firwoods
• FIS