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Plural of Halo

The Quick Answer
The plural of halo is halos or haloes.

The Plural of Halo

The plural of halo is halos or haloes.
  • Halos are most often depicted as golden, yellow, white, or red when flames are depicted.
  • Plain round haloes are typically used to signify saints.
The noun halo adheres to the standard rules for forming the plurals of nouns in English (shown in the table below).

Type Example of Type Forming the Plural Plural
Most Nouns lamp
add s lamps
Noun Ending s, sh, ch, x or z bus
add es buses
Nouns ending [consonant] o halo
add either s or es
(There are no rules for this - you have to know.)
halos or haloes
Nouns ending [vowel] o patio
add s patios
Nouns ending [consonant] y story
change the y to an i and add es stories
Nouns ending [vowel] y storey ()
add s storeys
Nouns ending f or fe dwarf
ves and/or s
(There are no rules - you have to know.)
Exceptions man
some nouns undergo a vowel or letters change men
More exceptions salmon
some nouns do not change at all salmon

Why Is There Confusion over the Plural of Halo?

There is confusion because the rule for forming plurals with nouns ending in o isn't straightforward. Most nouns will just add an s. For example:
  • Kangaroo becomes kangaroos.
  • Piano becomes pianos.
Some add es. For example:
  • Embargo becomes embargoes.
  • Torpedo becomes torpedoes.
With some words, both versions are accepted. For example:
  • Volcano becomes volcanoes or volcanos.
  • Echo becomes echoes or echos.
The plural of halo can be either halos or haloes. Unfortunately, there is no clever way of knowing which nouns ending o follow which rules. You have to know. (For example, you have to know that solo becomes solos, but tomatos becomes tomatoes.)

Though halos and haloes are both accepted plurals, halos is the more common of the two. (See the difference in Google's Ngram Viewer.)

Don't Use an Apostrophe to Form a Plural

Adding 's is never an option when forming the plural of a noun. Despite this simple rule, inexperienced writers often feel compelled to add an apostrophe, especially when the noun ends with a vowel (e.g., piano, tomato, emu). For example:
  • Sweet potatoe's are a good source of magnesium.
  • Sweet potatoes are a good source of magnesium.
Read more about apostrophes and plurals.
Read more about using apostrophes.