The word pilots' is a plural possessive noun.pilot is singularpilots is pluralpilots' is plural possessiveExample:The pilots' lounge is on the second level. (the lounge for the pilots)
The collective noun for pilots is a crew of pilots.
The collective noun for pilots is a crew of pilots.
The possessive form of the plural noun pilots is pilots'.Example: You will find him in the pilots' lounge.
Fighter aircraft are in a flight, wing, or squadron.
The noun 'kind' is an abstract noun. There is no form for kind that is a concrete noun.
The plural form of the noun pilot is pilots.The plural possessive form is pilots'.Example: The notice is posted in the pilots' lounge.
Just simple math
The noun 'crew' is a collective noun for: a crew of barbers a crew of laborers a crew of pilots a crew of rowers a crew of sailors a crew of firemen or rescue workers.
The possessive form for the plural noun jets is jets'.Example: The jets' pilots continually update their training.
The noun 'kind' is an abstact noun as a word for a type or class. The abstract noun form of the adjective "kind" is "kindness".
The word 'kind' is both an adjective and a noun. The noun kind, a singular, common, abstract noun is a word for a group of individuals or instances sharing common traits; a category.The noun forms for the adjective kind are kindness and kindliness.