Yes, cross is playable
...and is worth 8 points.
Found in the following dictionaries
Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
"Cross" Definition
noun
A mark or pattern formed by the intersection of two lines, especially such a mark (X) used as a signature.
A medal, emblem, or insignia in the form of a cross.
A movement from one place to another, as on a stage; a crossing.
A pipe fitting with four branches in upright and transverse form, used as a junction for intersecting pipes.
preposition
verb-transitive
Biology To crossbreed or cross-fertilize (plants or animals).
To betray or deceive; double-cross. Often used with up.
To carry or conduct across something: crossed the horses at the ford.
To combine the qualities of two things: a movie that crosses horror with humor.
To delete or eliminate by or as if by drawing a line through: crossed tasks off her list as she did them.
verb-intransitive
Biology To crossbreed or cross-fertilize.
To lie or pass across each other; intersect.
To make a crossing: crossed into Germany from Switzerland.
To meet in passing; come into conjunction: Their paths crossed at the health club.
To move or be conveyed in opposite directions at the same time: Our letters must have crossed in the mail.
adjective
Contrary or counter; opposing.
Involving interchange; reciprocal.
Lying or passing crosswise; intersecting: a cross street.
Showing ill humor; annoyed.
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