We don't have synonyms for chronotype yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are chronotope, chromotype and chromatype.
(n) :
The natural disposition of a person to be more alert or lethargic at different times in the day (especially either in the morning or the evening), depending on a variety of factors associated with circadian rhythms.
(n) :
The natural disposition of a person to be more alert or lethargic at different times in the day (especially either in the morning or the evening), depending on a variety of factors associated with circadian rhythms.