We don't have synonyms for groid yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are grid, groin and aroid.
(n) :
(slang, derogatory, ethnic slur) Clipping of negroid. [(anthropology, dated, offensive, ethnic slur) A person with characteristics of Africans, particularly coiled hair and dark skin.]
(n) :
(slang, derogatory, ethnic slur) Clipping of negroid. [(anthropology, dated, offensive, ethnic slur) A person with characteristics of Africans, particularly coiled hair and dark skin.]