Some unusual nouns are collywobbles, donnybrook, ignoramus, braggart, and homily.
collywobbles- a feeling of fear, apprehension or nervousness
donnybrook- inordinately wild fight
ignoramus- and extremely ignorant person
braggart- a person who does a lot of bragging
homily- a sermon
Unique is a matter of opinion and a matter of time. Many names for people or things, no matter how unusual, often become trends. For example, names like Google and Yahoo were once very unique nouns to use as the name of a company but it became a trend to use odd or unusual nouns to name a company or product. Names like Mortimer and Myrtle were not uncommon names for people a century ago but a very unique name in the twenty-first century.
Unique names for people can be a handicap. For example, Frank and Gail Zappa named their children Moon Unit, Dweezil Ahmet, and Diva Muffin. The family is in the entertainment business where it pays to stand out, but an average family in an average neighborhood may have to struggle with very odd names.
Businesses and products are usually named to instill a particular quality or confidence in the business or product. People may be reluctant to put their money in Big Billy's Bank, hiring the Precious Paving Company, or purchasing a bottle of Murky Mouthwash. Those would be unique proper nouns.
Some examples of proper nouns for things:
Common nouns are the words for general things. Examples include house, god, and man.
If by 'invisible' you mean abstract nouns, words for things that can't be seen, heard, smelled, tasted, or touched, some examples are:attitudebeautycaredestinyeducationfriendshipgratitudehopeideajokekindnesslovemysteryneedopinionpeacequestreasonseasontrusturgevalueworryyearzeal
Chicken
Some examples of 'quality of mind' nouns, also called abstract nouns, are:anxietybraveryconfidencedecisivenesseuphemismfungenerosityhappinessisolationjoyknowledgeluxurymemorynewsopinionpurposequestionreasonsorrowtroubleurgevaluewealthyearzeal
Some common nouns for Yankee Stadium are:arenabuildingbusinessfieldlandmarkstructurework placevenue
A proper noun is the name of a specific person, place, thing or a title. Some examples of proper nouns for things are:Apple ComputerCokeEiffel TowerFord ExplorerLevi'sMacy'sNike ShoesOreo CookiesPanama CanalStatue of LibertyRMS TitanicWashington Monument
Common nouns are the words for general things. Examples include house, god, and man.
"Jill, can you go start the car, out in the garage?" asked Bill. Jill and Bill are proper nouns. Places, names, and some things are proper nouns. Car and garage, and mundane things like this, are common nouns.
Examples of nouns for things are:appleballooncardiamondeducationflowergardenhydrogenicejokekitchenlunchmoneynecktieonionpromisequiltreasonstartoothumbrellaviolinwaterx-rayyearzenith
Examples of nouns for objects or things are:Brooklyn BridgeCheetosKindle FireJohn Deere D110 Lawn TractorPeople MagazineEiffel TowerRolex WatchVolkswagenWhopperSuper Bowl XLVIII
A material noun is a word for something that other things are made from. The definintion is as simple as that. Some examples of material nouns are:aluminumclayclothconcretecoppercottonglassleathermilkplasticsandsilksteelsilversugarwheat
Examples of common people nouns starting with L are:ladylandlordlawyerleaderlesseeliarlibrarianlieutenantExamples of proper people nouns starting with L are:LanceLaneLeonLeonardLeroyLewisLionelLuke
If by 'invisible' you mean abstract nouns, words for things that can't be seen, heard, smelled, tasted, or touched, some examples are:attitudebeautycaredestinyeducationfriendshipgratitudehopeideajokekindnesslovemysteryneedopinionpeacequestreasonseasontrusturgevalueworryyearzeal
Chicken
Examples of nouns for things that are purple are:amethystclothingDino (The Flinstones)duskdyeeye shadowgrapehathyacinthinkiriskalelavendernail polishonionpaintplumPurple Heartshoesviolets
Examples of nouns for things that are purple are:amethystclothingDino (The Flinstones)duskdyeeye shadowgrapehathyacinthinkiriskalelavendernail polishonionpaintplumPurple Heartshoesviolets
Proper nouns are the name of a specific person, place, thing, or a title. Proper nouns are always capitalized. Some examples are:Abraham LincolnAustraliaOreo Cookie"The Cat In The Hat" by Dr. SeussSpongebob SquarepantsGrand CanyonXboxDepartment of AgriculturePacific OceanCoke