It is headdress's. The possessive singular of all English nouns, regardless of spelling, is formed by adding -'s.
The singular possessive of "headdress" is "headdress's".
The singular possessive form of "headdress" is "headdress's."
The singular possessive form of "headdress" is "headdress's."
The singular possessive form is headdress's. The plural possessive form is headdresses'.
The singular form of headdress is "headdress," and the plural form is "headdresses."
The plural possessive form of "headdress" is "headdresses'".
The singular possessive form of "headdress" is "headdress's."
The singular possessive form is headdress's. The plural possessive form is headdresses'.
Quantum is singular, not singular possessive. The singular possessive form is quantum's.
The plural form of the noun headdress is headdresses. The plural possessive form is headdresses'. Example: The dancers have to rehearse in costume because of their headdresses' weight.
The plural possessive form of "headdress" is "headdresses'".
The plural form of the noun headdress is headdresses.The plural possessive form is headdresses'.Example: The dancers rehearsed moving gracefully under their headdresses' weight.
The singular possessive of "ant" is "ant's" and the plural possessive is "ants'".
Museum is singular. Museum's is singular possessive. Museums is plural. Museums' is plural possessive.
The singular possessive pronouns are "my," "mine," "your," "yours," "his," "her," and "its."
The singular possessive of dish is dish's
The singular possessive is Martin's.
The singular possessive is fish's.