conditioner — A conditioner is a substance which you can put on your hair after you have washed it to make it softer.
foreign minister — (in countries other than the U.S.) a cabinet minister who conducts and supervises foreign and diplomatic relations with other states. Also called, especially British, foreign secretary. Compare secretary of state (def 1).
high commissioner — a representative of one sovereign member of the Commonwealth of Nations in the country of another, having a rank and responsibilities generally similar to those of an ambassador.
master cylinder — the hydraulic pump of an automotive braking system that contains a cylinder and one or two pistons, is actuated by the brake pedal, and supplies hydraulic fluid under pressure to the brakes at each wheel.
perpendicular — vertical; straight up and down; upright.
polarimeter — an instrument for measuring the amount of light received from a given source as a function of its state of polarization.
cider vinegar — a type of vinegar produced by the acetification of cider
general practitioner — a medical practitioner whose practice is not limited to any specific branch of medicine or class of diseases. Abbreviation: G.P.
kindler — to start (a fire); cause (a flame, blaze, etc.) to begin burning.
littler — small in size; not big; not large; tiny: a little desk in the corner of the room.
simpler — easy to understand, deal with, use, etc.: a simple matter; simple tools.
sprinkler — any of various devices for sprinkling, as a watering pot, a container of water with a perforated top used to sprinkle clothes before ironing, or especially a perforated ring or small stand with a revolving nozzle to which a hose is attached for watering a lawn with a fine, even spray.
stickler — a person who insists on something unyieldingly (usually followed by for): a stickler for ceremony.
swindler — to cheat (a person, business, etc.) out of money or other assets.
Three-syllable rhymes
christopher — Saint. 3rd century ad, Christian martyr; patron saint of travellers
cinnabar — a bright red or brownish-red mineral form of mercuric sulphide (mercury(II) sulphide), found close to areas of volcanic activity and hot springs. It is the main commercial source of mercury. Formula: HgS. Crystal structure: hexagonal
cylinder — A cylinder is an object with flat circular ends and long straight sides.
insecure — subject to fears, doubts, etc.; not self-confident or assured: an insecure person.
insofar — to such an extent (usually followed by as): I will do the work insofar as I am able.
insular — of or relating to an island or islands: insular possessions.
integer — Mathematics. one of the positive or negative numbers 1, 2, 3, etc., or zero. Compare whole number.
kitchener — Horatio Herbert (1st Earl Kitchener of Khartoum and of Broome) 1850–1916, English field marshal and statesman.
lincolnshire — a county in E England. 2272 sq. mi. (5885 sq. km).
listener — to give attention with the ear; attend closely for the purpose of hearing; give ear.
millibar — a centimeter-gram-second unit of pressure equal to one thousandth of a bar or 1000 dynes per square centimeter, used to measure air pressure. Abbreviation: mb.
minister — a person authorized to conduct religious worship; member of the clergy; pastor.
prisoner — a person who is confined in prison or kept in custody, especially as the result of legal process.
signature — a person's name, or a mark representing it, as signed personally or by deputy, as in subscribing a letter or other document.
similar — having a likeness or resemblance, especially in a general way: two similar houses.
singapore — an island on the Strait of Singapore, off the S tip of the Malay Peninsula.
singular — extraordinary; remarkable; exceptional: a singular success.
sycamore — Also called buttonwood. any of several North American plane trees, especially Platanus occidentalis, having shallowly lobed ovate leaves, globular seed heads, and wood valued as timber.
titular — existing or being such in title only; nominal; having the title but none of the associated duties, powers, etc.: the titular head of the company.
vinegar — a sour liquid consisting of dilute and impure acetic acid, obtained by acetous fermentation from wine, cider, beer, ale, or the like: used as a condiment, preservative, etc.
visitor — a person who visits, as for reasons of friendship, business, duty, travel, or the like.
Four-or-more syllable rhymes
administer — If someone administers something such as a country, the law, or a test, they take responsibility for organizing and supervising it.
altimeter — An altimeter is an instrument in an aircraft that shows the height of the aircraft above the ground.
calligraphy — Calligraphy is the art of producing beautiful handwriting using a brush or a special pen.
commissioner — A commissioner is an important official in a government department or other organization.
contributor — You can use contributor to refer to one of the causes of an event or situation, especially if that event or situation is an unpleasant one.
curricular — the aggregate of courses of study given in a school, college, university, etc.: The school is adding more science courses to its curriculum.
pre-estimate — to form an approximate judgment or opinion regarding the worth, amount, size, weight, etc., of; calculate approximately: to estimate the cost of a college education.
key signature — (in notation) the group of sharps or flats placed after the clef to indicate the tonality of the music following.
parishioner — one of the community or inhabitants of a parish.
particular — of or relating to a single or specific person, thing, group, class, occasion, etc., rather than to others or all; special rather than general: one's particular interests in books.
peninsular — an area of land almost completely surrounded by water except for an isthmus connecting it with the mainland.
perimeter — the border or outer boundary of a two-dimensional figure.
petitioner — a formally drawn request, often bearing the names of a number of those making the request, that is addressed to a person or group of persons in authority or power, soliciting some favor, right, mercy, or other benefit: a petition for clemency; a petition for the repeal of an unfair law.
practitioner — a person engaged in the practice of a profession, occupation, etc.: a medical practitioner.
prime minister — the principal minister and head of government in parliamentary systems; chief of the cabinet or ministry: the British prime minister.