Is “Sixth” a Scrabble word?
Yes
SIXTH
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Sixth
/sɪk(s)θ/
noun
1.(not used in the plural) The person or thing in the sixth position.
2.One of six equal parts of a whole.
3.The interval between one note and another, five notes higher in the scale, for example C to A, a major sixth, or C to A flat, a minor sixth. (Note that the interval covers six notes counting inclusively, for example C-D-E-F-G-A.)
Synonyms: ⅙
verb
1.To divide by six, which also means multiplying a denominator by six
adjective
1.The ordinal form of the number six.
Synonyms: 6th, VI, VIth