Most nouns form their plural by adding s.
| Singular | Plural |
| book | books |
| school | schools |
| car | cars |
| rat | rats |
| mother | mothers |
| ship | ships |
| farmer | farmers |
| mountain | mountains |
| sea | seas |
| river | rivers |
| bee | bees |
| hat | hats |
| flower | flowers |
| pencil | pencils |
| umbrella | umbrellas |
| table | tables |
| toy | toys |
| moon | moons |
| animal | animals |
| plant | plants |
| desk | desks |
| cake | cakes |
| fan | fans |
| hand | hands |
| planet | planets |
| guest | guests |
| booth | booths |
Click here for the complete list of rules of forming the plural of nouns.