meaningless

As a noun vanity

is that which is vain, futile, or worthless; that which is of no value, use or profit.

As an adjective meaningless is

lacking meaning.

As adjectives the difference between nonsensical and meaningless

is that nonsensical is without sense; unmeaning; absurd; foolish; irrational; preposterous while meaningless is lacking meaning.

As adjectives the difference between meaningless and perplexing

is that meaningless is lacking meaning while perplexing is confusing or puzzling.

As a verb perplexing is

present participle of lang=en.

As adjectives the difference between meaningless and arbitrary

is that meaningless is lacking meaning while arbitrary is based on individual discretion or judgment; not based on any objective distinction, perhaps even made at random.

As a noun arbitrary is

anything arbitrary, such as an arithmetical value or a fee.

Meaningless is a related term of unrewarding.

As adjectives the difference between meaningless and unrewarding

is that meaningless is lacking meaning while unrewarding is not providing reward or satisfaction.

Meaningless is a related term of wasted.

As adjectives the difference between meaningless and wasted

is that meaningless is lacking meaning while wasted is not profitably used.

As a verb wasted is

(waste).

As adjectives the difference between tinny and meaningless

is that tinny is of or pertaining to or resembling tin while meaningless is lacking meaning.

As adjectives the difference between idle and meaningless

is that idle is (lb) empty, vacant while meaningless is lacking meaning.

As a verb idle

is to spend in idleness; to waste; to consume.

As an adjective meaningless

is lacking meaning.

As a noun null is

zero, nil; the cardinal number before einn.

As adjectives the difference between meaningless and foolish

is that meaningless is lacking meaning while foolish is lacking good sense or judgement; unwise.