Is “Mononym” a Scrabble word?
Yes
MONONYM
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 Mononym
noun
1.A single name by which a person, thing etc is known.
“The singer-songwriter Madonna Louise Ciccone is known by the mononym Madonna.”
2.A single term for a thing or concept, allowing for no synonyms.
Synonyms: monomial, mononom, mononomial, uninym