crucial /krooˈshəl/

1. Testing or decisive
2. Essential, very important
3. Very good (slang)
4. Crosslike
5. Of the nature of a crux

• feoffment
• feoffments
• feoffor
• feoffors
• feoffs
• feracious
• feracities
• feracity
• ferae naturae
• feral
• feralised
• feralized
• fer-de-lance
• fere
• ferer
• feres
• ferest
• feretories
• feretory
• ferial
• ferine
• Feringhee
• Feringhi
• ferities
• ferity