soph·o·more 
(sŏfə-môr′, sŏfmôr′)
(sŏfə-môr′, sŏfmôr′)n.
1.
a. A second-year student in a US college.
b. A tenth-grade student in a US high school.
2. A person in the second year of carrying out an endeavor.
3. A three-year-old racehorse, usually in its second year of racing.
adj.
1. Of or relating to the second year of an endeavor, especially of attending a school or college.
2. Being the second in a series: a singer's sophomore album.
[Alteration (probably influenced by Greek sophos, wise, and mōros, stupid) of sophumer, from obsolete sophom, sophism, dialectic exercise, variant of SOPHISM.]