Irregular Words - Multiple Plural Forms

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Irregular Words
antenna [noun]

one of a pair of jointed sensory appendages on the head of insects, crustaceans, or similar organisms, often used to detect touch, taste, or movement

Ex:
apex [noun]

the topmost point of something

Ex: The statue was placed at the apex of the hill , overlooking the surrounding valley .
appendix [noun]

a sack of tissue that is attached to the large intestine and is surgically removed if infected

Ex: After removal , the appendix typically does not affect normal bodily functions .
beau [noun]

a man romantically involved with someone

Ex: Letters between the two revealed the depth of affection she held for her longtime beau .
bureau [noun]

a desk with drawers and a hinged writing surface on top

Ex: The antique bureau has a fold-down writing surface .
cactus [noun]

a desert plant with a lot of spines on a thick stem that stores water

Ex: He waters his cactus once a week to prevent overwatering .
buffalo [noun]

the large, shaggy-haired brown bison native to the North American plains

Ex: Early settlers hunted buffalo for food and hides .

the overall content, courses, and learning experiences designed by educational institutions to achieve specific educational goals and outcomes for students

Ex: The curriculum for early childhood education emphasizes social-emotional development and play-based learning .
dwarf [noun]

a fictional, small human-like creature that generally lives under the ground and works in mines

Ex: Bilbo Baggins encountered dwarfs on his epic journey in " The Hobbit . "
formula [noun]

(mathematics) a rule or law represented in symbols, letters, or numbers

Ex: Engineers rely on formulas to calculate stress and strain in materials under different conditions .
fungus [noun]

a plant-like organism that often grows on organic matter and has no flowers or leaves, such as moulds and mushrooms

Ex: The forest floor was dotted with various types of fungus , from mushrooms to mold .
genus [noun]

(biology) any of the groups that plants, animals, etc. with similar characteristics are divided into, which is larger than a species and smaller than a family

Ex: Orchids belong to the genus Orchidaceae , which is one of the largest families of flowering plants .
hoof [noun]

the horny and hard part at the end of a limb of a mammal, such as a horse

Ex:
index [noun]

a system that provides the amount of prices, costs, etc. so that one can compare them with their previous value

Ex:
matrix [noun]

a rectangular array of numbers or symbols organized in rows and columns, commonly used in linear algebra for representing equations, transformations, and vector operations

Ex: Multiplying a matrix by a vector is a common operation in linear algebra , used in applications like computer programming and physics .
medium [noun]

a means that is used for the purpose of communicating or expressing something

Ex: The lecture served as a medium to convey complex scientific ideas .

a written message or communication, often used within an organization, to convey information, directives, or agreements to employees or stakeholders in a concise and formal manner

Nebula [noun]

a glowing cloud of gas and dust in outer space, often the result of a star explosion or formation

Ex:
opus [noun]

a musical piece or collection that is written by a famous composer followed by the date in which it was created

Ex:
plateau [noun]

an area of land that is flat and higher than the land surrounding it

Ex: After a steep climb , the hikers reached the top of the plateau , where they were rewarded with panoramic views of the valley below .
radius [noun]

the length of a straight line drawn from the center of a circle to any point on its outer boundary

Ex: The architect calculated the radius of the dome to ensure its proportions were aesthetically pleasing .

the process by which all the people of a country have the opportunity to vote on a single political question

scarf [noun]

a piece of cloth, often worn around the neck or head, which can be shaped in a square, rectangular, or triangular form

Ex: They gave each guest a warm scarf as a souvenir from the snowy mountain resort .
syllabus [noun]

a document that outlines the topics, assignments, and expectations for a course

Ex: The syllabus for the History course details the chronological periods , key events , and assigned readings .

a conference or meeting where experts discuss a particular topic or set of topics

vertex [noun]

the highest point or peak of something

Ex: The eagle soared gracefully to the vertex of the sky , surveying the landscape below .
vortex [noun]

a swirling mass of fluid with a rotating motion, often forming a funnel shape

Ex: The scientist observed the miniature vortex in the laboratory , studying its properties to better understand fluid behavior .
wharf [noun]

a structure built along the water's edge; often with a platform for ships to load and unload goods

Ex: The cargo was unloaded at the busy wharf .

a large African mammal with a thick gray skin, big jaws and tusks that lives near water

Ex:
aquarium [noun]

a large container usually made of glass that is filled with water in which fish and other sea creatures are kept

Ex: She spends hours watching the angelfish swim in her bedroom aquarium .
codex [noun]

an ancient book, written by hand, especially of scriptures, classics, etc.

Ex: The codex was carefully preserved in a climate-controlled vault to prevent further deterioration of its delicate parchment pages .