We don't have synonyms for karthik yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are kartik.
(N) :
Murali Karthikeyan Muthuraman (born 13 September 1960), better known by his stage name Karthik, is an Indian actor, playback singer and politician who works in Tamil cinema.
(N) :
(born 7 November 1980) an Indian playback singer and composer.
(N) :
Murali Karthikeyan Muthuraman (born 13 September 1960), better known by his stage name Karthik, is an Indian actor, playback singer and politician who works in Tamil cinema.
(N) :
(born 7 November 1980) an Indian playback singer and composer.