Synonyms for Trimmer (same or very similar meaning)
WordNet sense 1 (a worker who thins out and trims trees and shrubs):
prunerWordNet sense 2 (capacitor having variable capacitance; used for making fine adjustments):
trimming capacitorWordNet sense 3 (joist that receives the end of a header in floor or roof framing in order to leave an opening for a staircase or chimney etc.):
trimmer joistFrom the ODE community, based on WordNetadd/edit