Strange.
critic
oblong; such as an oval or rectangle
The likely answer is "twenty." The "E" is probably incorrect.
Another word for strange event or equation
antidisestablishmentarisms Alphabet - 26 letters, starts with A
Strange
The word odd means unusual.
strange
Agreement.
deserted?
wear out
Single
critic
Headache starts and ends with the letters he. Another word is heartache.
crop
ready
ancient