List all the words which are pluralized by simply adding s to the f, please.

Is this good; 1To make regular nouns plural, add ‑s to the end.

cat – cats

house – houses

2If the singular noun ends in ‑s, -ss, -sh, -ch, -x, or -z, add ‑es to the end to make it plural.

truss – trusses

bus – buses

marsh – marshes

lunch – lunches

tax – taxes

blitz – blitzes

3In some cases, singular nouns ending in -s or -z, require that you double the -s or -z prior to adding the -es for pluralization.

fez – fezzes

gas –gasses

4If the noun ends with ‑f or ‑fe, the f is often changed to ‑ve before adding the -s to form the plural version.

wife – wives

wolf – wolves

Exceptions:

roof – roofs

belief – beliefs

chef – chefs

chief – chiefs

5If a singular noun ends in ‑y and the letter before the -y is a consonant, change the ending to ‑ies to make the noun plural.

city – cities

puppy – puppies

6If the singular noun ends in -y and the letter before the -y is a vowel, simply add an -s to make it plural.

ray – rays

boy – boys

7If the singular noun ends in ‑o, add ‑es to make it plural.

potato – potatoes

tomato – tomatoes

Exceptions:

photo – photos

piano – pianos

halo – halos

With the unique word volcano, you can apply the standard pluralization for words that end in -o or not. It’s your choice! Both of the following are correct:

volcanoes

volcanos

8If the singular noun ends in ‑us, the plural ending is frequently ‑i.

cactus – cacti

focus – foci

9If the singular noun ends in ‑is, the plural ending is ‑es.

analysis – analyses

ellipsis – ellipses

10If the singular noun ends in ‑on, the plural ending is ‑a.

phenomenon – phenomena

criterion – criteria

11Some nouns don’t change at all when they’re pluralized.

sheep – sheep

series – series

species – species

deer –deer

You need to see these nouns in context to identify them as singular or plural. Consider the following sentence:

Explanation: