Plural of Theory, Singular of Theories, Meaning of Theory, synonyms of Theory in English

Plural of Theory, Singular of Theories, Meaning of Theory, synonyms of Theory in English

Here we will learn the meaning of Theory & Theories, singular, plural, synonyms and example sentences of Theory and Theories. This basic lesson is very useful for kids and beginners. You will understand the difference between Theory and Theories. You will come to know about the singular of Theories and plural of Theory. This is brief but detailed lesson.

Meaning of Theory, Theories

The meaning of Theory is a supposition or a system of ideas intended to explain something, especially one based on general principles independent of the thing to be explained.

Singular and Plural of Theory, Theories in English

Singular Plural
Theory Theories


Synonyms of Theory, Theories

  • approach
  • argument
  • assumption
  • code
  • concept
  • doctrine
  • idea
  • ideology
  • method
  • philosophy
  • plan
  • position
  • premise
  • proposal
  • provision
  • rationale
  • scheme
  • speculation
  • suspicion
  • system
  • thesis
  • understanding
  • base
  • basis
  • codification
  • conditions
  • conjecture
  • dogma
  • feeling
  • foundation
  • grounds
  • guess
  • guesswork
  • hunch
  • impression
  • outlook
  • postulate
  • presentiment
  • presumption
  • shot
  • stab
  • supposal
  • supposition
  • surmise
  • theorem
  • formularization
  • suppose
  • systemization


Use of Theory & Theories in Example Sentences

  • The plan appears to be sound in theory.
  • A new theory of life was proposed by the biologist.
  • We decided to put the theory to the test.
  • Findings later confirmed the scientist’s theory.
  • It was a theory with no evidence to back it up.
  • These fresh facts cast doubt on the theory.
  • My theory has been supported by the experiment.
  • The theory has yet to be proven scientifically.
  • His theory appears to be supported by recent research.


A huge list of Singulars and Plurals in English.

Baby Babies
Actor Actors
Office Offices
Computer Computers
Child Children
Day Days
captain Captains
City Cities
Bank Banks
House Houses
Cloth Clothes
Chocolate Chocolates
class Classes
Newspaper Newspapers
Sheep Sheep
Girl Girls
Ring Rings
camp Camps
Fork Forks
Monkey Monkeys
Accident Accidents
Ball Balls
cigarette Cigarettes
club Clubs
engine Engines
Man Men
kitchen Kitchens
Person People
field Fields
Horse Horses
election Elections
edge Edges
Kid Kids
Party Parties
driver Drivers
Feather Feathers
Louse Lice
bird Birds
bridge Bridges
doctor Doctors
Magazine Magazines
Glass Glasses
Dress Dresses
farm Farms
Mouse Mice
Piano Pianos
chapter Chapters
Account Accounts
Apple Apples
Table Tables
dream Dreams
Adult Adults
Teacher Teachers
Shop Shops
Goose Geese
Beach Beaches
Cup Cups
Phone Phones
Student Students
Brothers Brothers
factory Factories
card Cards
Apartment Appartments
Answer Answers
Egg Eggs
face Faces
Address Addresses
Story Stories
Bottle Bottles
Pencil Pencils
School Schools
Plate Plates
country Countries
Artist Artists
library Libraries
Boy Boys
Door Doors
Suitcase Suitcases
Lady Ladies
Bed Beds
finger Fingers
bill Bills
film Films
list Lists
Daughter Daughters
Cat Cats
Bell Bells
Potato Potatoes
Boat Boats
castle Castles
Bag Bags
coat Coats
bush Bushes
College Colleges
Tomato Tomatoes
Idea Ideas
crowd Crowds
Pet Pets
Boot Boots
Tooth Teeth
chest Chests
Notebook Notebooks
Orange Oranges
ear Ears
corner Corners
Book Books
Woman Women
Hand Hands
Pilot Pilots
Article Articles
Friend Friends
Animal Animals
lake Lakes
Insect Insects
Chair Chairs
father Fathers
Deer Deer
Box Boxes
Bus Buses
king Kings
eye Eyes
machine Machines
Match Matches
case Cases
effect Effects
Waiter Waiters
Banana Bananas
Battle Battles
Tree Trees
Car Cars
key Keys
judge Judges
job Jobs
issue Issues
island Islands
husband Husbands
hour Hours
hotel Hotels
hospital Hospitals
hill Hills
heart Hearts
head Heads
hat Hats
hall Halls
gun Guns
group Groups
gate Gates
garden Gardens
game Games
foot Feet
problem Problems
plant Plants
plane Planes
plan Plans
picture Pictures
path Paths
park Parks
page Pages
neck Necks
nation Nations
motor Motors
month Months
model Models
mistake Mistakes
minute Minutes
method Methods
message Messages
member Members
meeting Meetings
meal Meals
Town Towns
Tour Tours
Thought Thoughts
Tent Tents
Task Tasks
Street Streets
Stream Streams
Station Stations
Star Stars
Spot Spots
Son Sons
Smile Smiles
Sister Sisters
Shock Shocks
Shirt Shirts
Scheme Schemes
Room Rooms
Road Roads
RIver Rivers
Project Projects
Valley Valleys
Village Villages
Walk Walks
Wall Walls
Week Weeks
Window Windows
Year Years
Mother Mothers
Inch Inches
Chief Chiefs
Essay Essays
Fox Foxes
Ox Oxen
Sky Skies
Mango Mangoes
Leaf Leaves
Cow Cows
Son-in-law Sons-in-law
Toy Toys
Singular Plural
News News
Bamboo Bamboos
Hair Hair
Radio Radios
Daughter-in-law Daughters-in-law
Dozen Dozen
Fish Fish
Father-in-law Fathers-in-law
Mother-in-law Mothers-in-law
Fly Flies
Proof Proofs
Hoof Hoofs
Leg Legs
Step son Step sons
Army Armies
Cry Cries
Watch Watches
Poetry Poetry
Class fellow Class fellows
Baby Babies
Maid servant Maid servants
Hero Heroes
Duty Duties
Jar Jars
Family Families
Copy Copies
Clutch Clutches
Scissors Scissors
Half Halves
Life Lives
Knife Knives
Bench Benches
Sister-in-law Sisters-in-law
Cliff Cliffs
Lass Lasses
Trousers Trousers
Loaf Loaves
Uncle Uncles
Cuckoo Cuckoos
Calf Calves
Gas Gasses
Brother-in-law Brothers-in-law
Wife Wives
Ass Asses
Self Selves
Ray Rays
Dog Dogs
Thief Thieves
Donkey Donkeys
Bone Bones
Buffalo Buffaloes
Baby Baby
Brother-in-law Brothers-in-laws
Caddy Caddies
Class  fellow Class fellows
Daughter-in-law Daughters-in-laws
Deck Decks
Deer Deers
Dozen Dozens
Father-in-law Fathers-in-laws
Fish Fishes
Hair Hairs
Loof Loops
Love Loves
Maidservant Maidservants
Mother-in-law Mothers-in-laws
Penny Pennies
Pitch Pitches
Poetry Poetries
Quiz Quizzes
Scissor Scissors
Sheep Sheeps
Singular  noon Plural noun
Sister-in-law Sisters-in-laws
Son-in-law Sons-in-laws
Stepson Stepsons
Trouser Trousers
Wish Wishes