stem vs theme

stem

noun
  • The main part of an uninflected word to which affixes may be added to form inflections of the word. A stem often has a more fundamental root. Systematic conjugations and declensions derive from their stems. 

  • A lesbian, chiefly African-American, exhibiting both stud and femme traits. 

  • A branch of a family. 

  • A component on a bicycle that connects the handlebars to the bicycle fork. 

  • The penis. 

  • A slender supporting member of an individual part of a plant such as a flower or a leaf; also, by analogy, the shaft of a feather. 

  • A premixed portion of a track for use in audio mastering and remixing. 

  • A person's leg. 

  • The vertical or nearly vertical forward extension of the keel, to which the forward ends of the planks or strakes are attached. 

  • A vertical stroke marking the length of a note in written music. 

  • A narrow part on certain man-made objects, such as a wine glass, a tobacco pipe, a spoon. 

  • A part of an anatomic structure considered without its possible branches or ramifications. 

  • A winder on a clock, watch, or similar mechanism. 

  • The stock of a family; a race or generation of progenitors. 

  • The above-ground stalk (technically axis) of a vascular plant, and certain anatomically similar, below-ground organs such as rhizomes, bulbs, tubers, and corms. 

  • A vertical stroke of a letter. 

  • A crack pipe; or the long, hollow portion of a similar pipe (i.e. meth pipe) resembling a crack pipe. 

  • An advanced or leading position; the lookout. 

verb
  • To direct the stem (of a ship) against; to make headway against. 

  • To ram (clay, etc.) into a blasting hole. 

  • To move the feet apart and point the tips of the skis inward in order to slow down the speed or to facilitate a turn. 

  • To be caused or derived; to originate. 

  • To stop, hinder (for instance, a river or blood). 

  • To descend in a family line. 

  • To remove the stem from. 

theme

noun
  • The stem of a word. 

  • The main melody of a piece of music, especially one that is the source of variations. 

  • A concept with multiple instantiations. 

  • Topic, what is generally being talked about, as opposed to rheme. 

  • A regional unit of organisation in the Byzantine empire. 

  • thematic relation of a noun phrase to a verb. 

  • Theta role in generative grammar and government and binding theory. 

  • A subject, now especially of a talk or an artistic piece; a topic. 

  • A song, or a snippet of a song, that identifies a film, a TV program, a character, etc. by playing at the appropriate time. 

  • Any of various colors, or color palettes, in which a design is offered; (graphical user interface) any of various skins for an app, affecting the visuals and perhaps other elements such as sound effects. 

verb
  • To give a theme to. 

  • To apply a theme to; to change the visual appearance and/or layout of (software). 

How often have the words stem and theme occurred in a corpus of books? (source: Google Ngram Viewer )