sab·bat·i·cal 
/səˈbætɪkəl/ noun
plural sab·bat·i·cals /səˈbætɪkəl/ noun : a period of time during which someone does not work at his or her regular job and is able to rest, travel, do research, etc. [count] ▪ Several professors will be taking sabbaticals this year. ▪ She recently returned to work after a two-year sabbatical from her acting career. ▪ a paid sabbatical [noncount] ▪ Several professors will be on sabbatical this year.
— sabbatical adjective always used before a noun
▪ I chose to take sabbatical leave next year. ▪ a sabbatical year
▪ I chose to take sabbatical leave next year. ▪ a sabbatical year
