Reindeer is both the singular and plural.
This is because of the English language's Germanic origin. Germanic languages have neuter nouns where the singular and plural are exactly the same.
To give a Germanic to English example::
The singular possessive for reindeer is reindeer's.
The noun reindeer is both the singular and the plural; the singular and the plural possessive form is reindeer's.
The plural possessive form of "reindeer" is "reindeers'." In this case, the plural form of "reindeer" is "reindeer," and to show possession, you add an apostrophe after the "s" in the plural form. This indicates that something belongs to multiple reindeer.
das Renntier (singular) die Renntiere (plural)
Lots of reindeer!!!!!!!!!!! *Reindeer is both the singular and plural, e.g. one cow, many cows; one child, many children; one reindeer, many reindeer.
Yes, reindeer is a countable noun; however, like the noun deer, the singular and the plural are spelled the same: one reindeer, eight reindeer. A uncountable noun (or mass noun) is noun for a substance or concept that is indivisible into countable units, words like water and knowledge.
The singular possessive for reindeer is reindeer's.
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.