The word 'seraphim' is the plural form of the noun 'seraph'.
An alternate accepted plural form is 'seraphs'.
Seraphim is the plural and the seraph is the singular
The singular form is 'seraph' and the plural form is seraphim. In the King James Version, the 'double-plural' form is used twice in Isaiah:Isaiah 6:6King James Version (KJV) 6 Then flew one of the seraphims unto me, having a live coal in his hand, which he had taken with the tongs from off the altar:
Cherub is the singular form. Cherubs is the plural form and Cherubim I believe is the collective whole!! E.G: The Human walked on the Moon, The Humans' walked on the Moon, The Human Beings walked on the Moon.
The singular "seraph" is a back-formation of the plural "seraphim" .
practitioner is singular (plural practitioners)sofa is singular (plural sofas)satellite is singular (plural satellites)clips is plural (singular clip)dentist is singular (plural dentists)dollars is plural (singular dollar)article is singular (plural articles)magazines is plural (singular magazine)laminator is singular (laminators is plural)radios is plural (singular radio)
singular and plural
Singular: book / Plural: books Singular: cat / Plural: cats Singular: child / Plural: children Singular: foot / Plural: feet
Are is plural. "Is" is singular. For example, "There is a glove on the chair". That is singular. "There are gloves on the chair". That is plural.
"Has" is singular, e.g. He has, she has. "Have" is plural, e.g. They have, we have. The exception is "I" - e.g. I have.
The word team is singular; the plural form is teams.
Who may be singular or plural.
This is singular. These is the plural form.