The plural is powders. look in this site http:/dictionary.reference.com/browse/powder
The plural form of liquid is liquids.
Synthesis is the singular form, syntheses is the plural form, and syntheses' is the plural possessive form.
There is no such plural
The plural form of the noun laboratory is laboratories.The plural possessive form is laboratories'.
The plural form for the singular noun chemist is chemists.
There is no plural form. Do and Do not are verbs
The plural form of him, her, or it is them. (objective pronouns)
Bridges is the plural form of bridge.
The plural form of "is" is "are."
The plural form of "I" is "we."
The plural form of "was" is "were."
The plural form of the noun 'powder' is powders, a word for 'types of' or 'kinds of' powder. Example: The display of powders ranged from simple to exotic. The singular noun 'powder' is an uncountable as a word for a substance. Example: The dressing table was covered with powder.
"Groceries" is the plural form of "grocery."
"Beliefs" does not have a plural form, as it is already plural. Beliefs is the plural form of belief.
The plural form of mouth is mouths. The plural form of month is months. The Mounth is a range of hills in Scotland and does not have a plural form.
The plural form of the demonstrative pronoun 'that' is those.
The plural form is metres.