careful — If you are careful, you give serious attention to what you are doing, in order to avoid harm, damage, or mistakes. If you are careful to do something, you make sure that you do it.
cheerful — Someone who is cheerful is happy and shows this in their behaviour.
dorsal — of, relating to, or situated at the back, or dorsum.
fearful — causing or apt to cause fear; frightening: a fearful apparition.
herschel — Sir John Frederick William, 1792–1871, English astronomer.
larval — of, relating to, or in the form of a larva.
marshal — a military officer of the highest rank, as in the French and some other armies. Compare field marshal.
tercel — the male of a hawk, especially of a gyrfalcon or peregrine.
Three-syllable rhymes
commercial — Commercial means involving or relating to the buying and selling of goods.
dispersal — The action or process of distributing things or people over a wide area.
earl marshal — an officer of the English peerage who presides over the College of Heralds and organizes royal processions and other important ceremonies
field marshal — an officer of the highest military rank in the British and certain other armies, and of the second highest rank in the French army.
impartial — not partial or biased; fair; just: an impartial judge.
inertial — inertness, especially with regard to effort, motion, action, and the like; inactivity; sluggishness.
john marshall — Alfred, 1842–1924, English economist.
prayerful — given to, characterized by, or expressive of prayer; devout.
rehearsal — a session of exercise, drill, or practice, usually private, in preparation for a public performance, ceremony, etc.: a play rehearsal; a wedding rehearsal.
controversial — If you describe something or someone as controversial, you mean that they are the subject of intense public argument, disagreement, or disapproval.
dress rehearsal — a rehearsal of a play or other performance in costume and with scenery, properties, and lights arranged and operated as for a performance: often the final rehearsal.
provost marshal — Army. an officer on the staff of a commander, charged with the maintaining of order and with other police functions within a command.
universal — of, relating to, or characteristic of all or the whole: universal experience.
Four-or-more syllable rhymes
uncontroversial — of, relating to, or characteristic of controversy, or prolonged public dispute, debate, or contention; polemical: a controversial book.