lecture — a speech read or delivered before an audience or class, especially for instruction or to set forth some subject: a lecture on Picasso's paintings.
structure — mode of building, construction, or organization; arrangement of parts, elements, or constituents: a pyramidal structure.
Three-syllable rhymes
architect — An architect is a person who designs buildings.
conjecture — A conjecture is a conclusion that is based on information that is not certain or complete.
departure — Departure or a departure is the act of going away from somewhere.
prefecture — the office, jurisdiction, territory, or official residence of a prefect.
Four-or-more syllable rhymes
agriculture — Agriculture is farming and the methods that are used to raise and look after crops and animals.