scholar — a learned or erudite person, especially one who has profound knowledge of a particular subject.
squalor — the condition of being squalid; filth and misery.
Three-syllable rhymes
dog collar — a collar used to restrain or identify a dog.
half dollar — a silver or cupronickel coin of the U.S., equal to 50 cents.
sand dollar — any of various flat, disklike sea urchins, as Mellita testudinata or Echinarachnius parma, that live on sandy bottoms off the coasts of the U.S.
clerical collar — a stiff white collar with no opening at the front that buttons at the back of the neck; the distinctive mark of the clergy in certain Churches