The possessive plural form of "synthesis" is "syntheses'".
The singular possessive form of synthesis is synthesis's.
The plural form of "ozone" is "ozones."
The plural possessive of "laboratory" is "laboratories'".
The plural form for the singular noun chemist is chemists.
The plural form of nitroglycerin is nitroglycerins.
The noun glasses (meaning spectacles) is a singular form, a shortened form of 'a pair of glasses'. The plural form for glasses is 'pairs of glasses'. If it means "vessels to hold liquid" then it is already plural, "glasses." Other examples of singular nouns that are a short form for 'a pair of...' are pants, shorts, drawers, jeans, scissors, shears, pliers, and binoculars.
The plural form of "do" is "do" and the plural form of "don't" is "don't." These words do not change in the plural form when used in a sentence.
The plural form of him, her, or it is them. (objective pronouns)
Bridges is the plural form of bridge.
A verb for liquid is liquefy.Other verbs are liquefies, liquefying and liquefied, depending on tense.
The plural form of "was" is "were."
The plural form of "I" is "we."
The plural form of "is" is "are."
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.
"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.