As adjectives the difference between operational and optional

is that operational is of or relating to operations, especially military operations while optional is not compulsory; left to personal choice; elective.

As a noun vision

is ghost.

As an adjective false is

(label) one of two states of a boolean variable; logic.

As adjectives the difference between aweful and woeful

is that aweful is while woeful is full of woe; sorrowful; distressed with grief or calamity.

As an adjective sleepy

is tired; feeling the need for sleep.

As a noun sleepy

is (informal) the gum that builds up in the eye.

As nouns the difference between timetable and arrangement

is that timetable is a structured schedule of events with the times at which they occur, especially times of arrivals and departures while arrangement is arrangement.

As a verb timetable

is to arrange a specific time for (an event, a class, etc).

As nouns the difference between carton and fiberboard

is that carton is cardboard, paperboard while fiberboard is (us) a material made from wood chips or shavings, which are compressed and bonded with resin and formed into stiff sheets, and used in building or making furniture.

As nouns the difference between airlock and interlock

is that airlock is a sealed, airtight chamber, such as in a manned spacecraft or submarine, used to provide access to and from the sealed area without allowing air out or water in while interlock is a safety device that prevents activation in unsafe conditions.

As a verb interlock is

to fit together securely.

As an adjective opulent

is luxuriant, and ostentatiously magnificent.

As a proper noun posh is

(soccer) , a football club from peterborough, england.

As a proper noun deluge

is (bible) the biblical flood during the time of noah.

As an adjective ample is

large; great in size, extent, capacity, or bulk; spacious; roomy; widely extended.

As verbs the difference between lingering and languishing

is that lingering is while languishing is .

As nouns the difference between lingering and languishing

is that lingering is an act of lingering or waiting while languishing is the act of one who languishes.

As an adjective languishing is

lacking of vigor or spirit.