Is “Sphinx” a Scrabble word?
Yes
SPHINX
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 Sphinx
/sfɪŋks/
noun
1.A creature with the head of a person and the body of an animal (commonly a lion).
2.A person who keeps his/her thoughts and intentions secret; an enigmatic person.
3.A mandrill, Mandrillus sphinx, formerly classified a baboon, and called sphinx baboon.
Synonyms: enigma
verb
1.To decorate with sphinxes
“a marble sphinxed chimney-piece”
2.To adopt the posture of the Sphinx.
“A hot lion with a very bloated stomach ... will adopt either a sphinxed or a squatting posture which takes some of the weight off its belly.”
3.To be inscrutable, often through silence
“(1900) The sphinxèd riddle of the Universe / Nature's unsolved enigma, who may prove?”