The nouns in your sentence are group, nouns, and sentence.
No one knows all abstract nouns, there are hundreds of them. Here are some examples:abilityadorationadventureagilityagreementallowanceamazementangerannoyanceanxietyapathyapprehensionartistryausterityawebeautybeggarybeliefbluffboredombraveryburdencalmcarecautionchaoscharitychildhoodcoldnesscomfortcommunicationcouragecrimedaydeathdeceitdefeatdelightdemocracydemondespairdeterminationdisappointmentdisbeliefdrudgeryeaseeducationegoeleganceelementempathyempireenergyenhancementenvyepitomeerrorevilexcitementfaithfashionfavorfearfoolfoolishnessforgivenessfreedomfriendshipfunfuturegallantrygenerositygeniusgesturegoodnessgossipgracegratitudegreatnessgriefgrumpinessgumptiongustohappinesshatehelphelpfulnesshelplessnessheroheroismhinthonestyhonourhopehumorhumourhurthypeideaidolatryignoranceimageryimaginationimitationimportanceinclinationindependenceindignityinfancyinitiationinquestinsincerityinsolenceinsultjealousyjeopardyjinxjokejournalismjoyjusticekeennesskeepsakekillerkinkindkindnessknowledgelaunchlegacylegendlessonleverageliabilitylibertylifeloanlootlosslovelucklunchlustmannersmastermattermeannessmelancholymessmightmisermiserymodemomentmonarchymoodmoralmoralemotivemuddlemysterynecessityneednicetynonchalancenonsensenormalcynotionnuancenuisanceoccasionomenopennessoptionpassionpeacepenaltypenuryperiodpermanenceperpetuitypersecutionperseverancepersuasionperversionpittancepityplaypleasureportionpotencypotentialpovertypowerprideprivacyprovidencepunishmentpurityquestionquicknessquietquirkquitterquizquotientragerationreasonreligionrepublicrequiemrightriotruckusrudimentruinruserushruthlessnesssalesanitysasssatisfactionsaviorsavvyseasonsensesentimentsessionsortspell (a period of time)spoilagesporttaletalenttelepathytemptationtensionterrortestthoughttidinesstimetimiditytraveltreattrusttruthtumultuglinessuneasinessunionuniquenessunityunrestupsetupturnurgeurgencyuseusuryvacancyvacationvalorvaluevariantventurevenuevulnerabilitywarwealthwelcomewistfulnesswonderworkworthyearyearningyonderzealzestzoologyzymurgy
A person can find a list of common nouns in any grade school text books. Local libraries will also have books that have lists of common nouns.
Some nouns to countries are:airplanesshipstrainsferriestouristsimportsSome nouns for countries are:homelandsdemocraciesmonarchiesrepublicsplacesterritories
Mass nouns are nouns that we cant count. Mass nouns like water,milk and chocolate can count so that they are called mass nouns.
Some nouns related to chickens are:chickscoopdrumstickeggfeatherfoodhenroostersoupwings
Some nouns related to fish are:vertebratefinsgillsnutritionspeciesschoolshoalsealakestreamresourceichthyology
Some nouns that are synonyms for mountains are:hillsrisespeaksbluffsbutteelevationrangeridgeformationvolcano
Some nouns for Halloween are:costumespartiescandyghostswitchesangelssuperherosprincessesvampiresdecorationsapple ciderpranks
The only use I could find for 'list' in collective nouns is 'a list of hulks', an obscure word for a ship that floats but is incapable of sailing.Thereapparentlyis no collective noun for 'lists', in which case a noun suitable for the situation is used, for example a list of lists, a book of lists, a journal of lists, etc.
The Foclóir Póca (Irish dictionary) lists 8 nouns for 'balance'. It will vary according to context.
The abstract nouns in the sentence are "justice," "freedom," and "equality."