Is “Diffuse” a Scrabble word?
Yes
DIFFUSE
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 Diffuse
/dɪˈfjuːz/
verb
1.To spread over or through as in air, water, or other matter, especially by fluid motion or passive means.
2.To be spread over or through as in air, water, or other matter, especially by fluid motion or passive means.
“Food coloring diffuses in water.”
Synonyms: forspread