Apiarist :: Apiarist (n.) One who keeps an apiary.
Piarist :: Piarist (n.) One of a religious order who are the regular clerks of the Scuole Pie (religious schools), an institute of secondary education, founded at Rome in the last years of the 16th century..
Topiarian :: Topiarian (a.) Of or pertaining to the ornamental cutting and trimming of trees, hedges, etc.; practicing ornamental gardening..