The plural of fireman is firemen (but if you want to be gender neutral, you can use firefighters). The plural of hero is heroes.
Firemen is a common noun. A proper noun would be the name of a specific fireman, like if you knew a fireman named Dan.
Traditionally, the gender was male. But, nowadays, females are also recruited into the fire service. Both sexes have to pass several physical tests to be accepted.
All English nouns are of common gender.
The common gender noun for 'housewife' is homemaker.
A common gender nouns for uncle are relative or family member.
A common gender noun is a word for a person or animal that can be either male or female; for example:common gender: person (gender nouns male or female, mother or father, man or worman)common gender: horse (gender nouns stallion or mare)common gender: pig (gender nouns boar or sow)General common gender nouns for people or animals that have no male or female noun are:partnerdoctorteacherteamherdflockNeuter gender nouns are words for things that have no gender; examples are:housechairskycarshoesfrost
Common gender
chairman, fireman, dustman
Common gender nouns are words for people or animals that can be either male or female. Examples of common gender nouns are:acrobatanthropologistarcherartistbabybarberbartenderbeauticianbutchercattlecharacterchildclowncriminalcustomerdeandeerdentistdesignerdoctoreditoreducatorengineerequestrianEuropeanfanfarmerfloristfriendfroghairdresserherohorsehumanice skaterichthyologisticonidiotjournalistjudgejugglerjurorkangarookleptomaniacknow-it-allkoalaleaderlecturerlife guardloan officerlovermerchantminerminormissionarymonkeymovie starnarcissistneighbornewtnightingaleofficeroffspringorioleorangutanostrichparentpartnerpersonpharmacistphysicianpilotquailrancherresearcherriderrulersecretarysenatorsiblingswanteachertellertherapisttouristtruck driverundertakervictorvillainvirtuosovisitorwalrusworkerwrenwriteryodeleryoungsterzealotzebrazoologist
Common gender nouns are words for someone or something that can be either male or female. Examples:parentfriendneighborteacherdoctorNeuter gender nouns are words for something that has no gender. Examples:housetrainboatshoebottle
No gender for the name plutonium. All English nouns are of common gender.