reason — a basis or cause, as for some belief, action, fact, event, etc.: the reason for declaring war.
season — one of the four periods of the year (spring, summer, autumn, and winter), beginning astronomically at an equinox or solstice, but geographically at different dates in different climates.
treason — the offense of acting to overthrow one's government or to harm or kill its sovereign.
Three-syllable rhymes
high treason — treason against the sovereign or state.
with reason — a basis or cause, as for some belief, action, fact, event, etc.: the reason for declaring war.
Four-or-more syllable rhymes
age of reason — a period of European history in the 18th cent. noted for belief in the ability of reason to discover truth, shape society, etc.
silly season — a time of year, usually in midsummer or during a holiday period, characterized by exaggerated news stories, frivolous entertainments, outlandish publicity stunts, etc.: The new movie reminds us that the silly season is here.
within reason — a basis or cause, as for some belief, action, fact, event, etc.: the reason for declaring war.