What is the X in X-mas?

18

22

Scrabble
Words With Friends

- infielder
- infighting
- infill
- infiltrate
- infiltration
- infiltration anesthesia
- infiltration capacity
- infiltration gallery
- infiltrator
- infiltrometer
- infimum
- infin.
- infinite
- infinite baffle
- infinite decimal
- infinite distance
- infinite impulse response
- infinite integral
- infinite loop
- infinite monkey theorem
- infinite number
- infinite product
- infinite regress
- infinite series
- infinite set
- infinitesimal
- infinitesimal calculus
- infinitival
- infinitive
- infinitive clause
- infinitive marker
- infinitize
- infinitude
- infinitum
- infinity
- infinity pool
- infirm
- infirmarian
- infirmary
- infirmity
- infix
- infix notation
- infix syntax
- infj
- infl.
- inflame
- inflamed
- inflammable
- inflammation
- inflammatory
- inflammatory bowel disease