fish-
this is a tricky one ,
you can have 1 fish or many fish but if there are different types of fish, such as catfish mixed with flounder you have many FISHES
geese - singular goose
yet moose is always plural - 1 moose many moose
mice - singular mouse
lice - singular louse
How about: rice or wheat? [I am indulging, even if temporarily. I find that few people use the discussion areas except in a couple of specialized topics. All of this may go to Discussion eventually, but I wanted to share it before sending it to limbo.]
It's interesting that a question that appears so simple can have some subtle problems connected with it. Natural Val's original choices of geese, mice and lice I think are good. They are in fact always plural. Goose is not the same word as geese, and the questioner is seeking words that are always plural. Natural Val chose words whose plural forms don't follow the usual rules. Maybe that is the questioner's intention. Using the 'different word' argument though, we have to conclude that many if not all plural nouns [ie, acorns] that don't have identical singular and plural forms are in fact words that are always plural. The question may reduce to a tautology. Words that are always plural words are words that are only plural. I considered offering:
scissors
pants
rabies
which I thought could only exist in these plural forms, but there are problems with at least the first two, which indeed have singular forms. Rabies is considered a singular noun with rabies as the plural form.
Rice and wheat have their problems as well. The contributor clearly and correctly understands that if I am having rice with dinner, I'm not going to say "I had chicken and [hundreds of] rices... It [they?] was [were?] delicious. The problem is that they [rice and wheat] take singular form (probably always). I would not say that "Rice are [a] staple food[s] in many parts of the world."
There is something not the least bit trivial about this mystery over "pluralness". We seem to know much more than the simple information coded in our lexicon, and what we know, even the "simple stuff", can be very difficult to express.
Some words that end in -s that are always plural are:accommodationsamendsarchivesbarracksbinocularsbowelsclothescommunicationscongratulationscontentscrossroadsforcepsgallowsglasses (vision aid)goodsheadquartersjeansmathematicsmeansnewspajamaspantsscissorsseriesshortsspeciesstairstongstrouserstweezers
Nouns that are always plural with no singular form are:newsmathematicsclothes
People and Police
No, nouns ending in 's' are not always plural; some examples are:abacusabyssaddressasparagusbassbiasbonusbuscactuscallouscampuscircusclasscompasscosmosdaisdiabetesdiscusdressemphasisethosficusfocusfungusgasgeniusglassgrasshaggishepatitishiatushibiscushippopotamushummusibisisthmuskisslasslenslossmantismessmetropolismolassesmossnemesisnexusnucleusoasisoctopusonusosmosispantsparenthesispasspelvisphysicsplatypuspluspressprogresspusradiusrhesusruckussassafrassisstatusstratusstresssuccesssurplussynopsistennisTexastrellistrussviruswalruswatercresswellnesswitnessyes
Examples of nouns that are the same in the singular and plural form:deerfishfurnitureoffspringpoultrysalmonsheepswinetroutyouth
True. Sheep for instance
The indefinite pronouns that are always plural are:bothfewfewermanyothersseveralthey (used for people in general)
One group of words that have no singular form are aggregate nouns, words representing an indefinite number of elements or parts. The following aggregate nouns have no singular form::accommodationsamendsarchivesarms (weapons)bowelsbrains (intellect)clothescommunicationscongratulationscontentscorpsgoodsintestinesmeaslesnewsAnother group of nouns are always plural are the binary nouns, words for things that are two parts making up the whole, they are a shortened form for 'a pair of', for example:one pair of glasses, two pairs of glassesbellowsbinocularsforcepsjeanspajamaspantspliersshearsshortsscissorstightstongstrouserstweezers
It is always considered as plural.
Indefinite pronouns that are always plural are:bothfewfewermanyothersseveralthey
These nouns are always plural and they always take plural verbs: * glasses * pants/trousers * shorts * pajamas * jeans * people * police * scissors
The plural of the word "system" is "systems"