1) DC numerical prefix 2) Big name in hotels 3) Combining form for five 4) Five in front 5) Gram leader 6) Gram start 7) Half deca- 8) Half of deca- 9) Hexa- minus one 10) Numerical prefix 11) Numerical word form 12) One less than hexa- 13) Prefix for five 14) Prefix for teuch or gon 15) Prefix meaning five 
Penta is a cultivated variety of potato.