What is the X in X-mas?

17

19

Scrabble
Words With Friends

- equal pay
- equal protection of the laws
- equal rights amendment
- equal sign
- equal temperament
- equal time
- equal to
- equal-area
- equal-area projection
- equali
- equalitarian
- equality
- equality state
- equalization
- equalization fund
- equalization payment
- equalize
- equalizer
- equally
- equals
- equanil
- equanimity
- equanimous
- equant
- equate
- equation
- equation division
- equation movement
- equation of motion
- equation of state
- equation of time
- equational
- equational logic
- equational verb
- equative
- equator
- equatorial
- equatorial coordinate system
- equatorial countercurrent
- equatorial current
- equatorial guinea
- equatorial islands
- equatorial mount
- equatorial mounting
- equatorial plane
- equatorial plate
- equatorial staphyloma
- equatorial telescope
- equatorial tide
- equatorial trough
- equatorward