Is “Thicken” a Scrabble word?
Yes
THICKEN
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 Thicken
/ˈθɪkən/
verb
1.To make thicker (in the sense of wider).
2.To make thicker (in the sense of more viscous).
“to thicken a sauce”
3.To become thicker (in the sense of wider).
Synonyms: inspissate, widen, condense, engross, inspissate, broaden