thoughtless

As adjectives the difference between thoughtless and irrational

is that thoughtless is marked by or showing lack of due thought or care; careless while irrational is not rational; unfounded or nonsensical.

As a noun irrational is

a real number that can not be expressed as the quotient of two integers, an irrational number.

As adjectives the difference between random and thoughtless

is that random is having unpredictable outcomes and, in the ideal case, all outcomes equally probable; resulting from such selection; lacking statistical correlation while thoughtless is marked by or showing lack of due thought or care; careless.

As a noun random

is a roving motion; course without definite direction; lack of rule or method; chance.

As adjectives the difference between thoughtless and undefined

is that thoughtless is marked by or showing lack of due thought or care; careless while undefined is lacking a definition or value.

Thoughtless is a related term of dull.

As adjectives the difference between thoughtless and dull

is that thoughtless is marked by or showing lack of due thought or care; careless while dull is lacking the ability to cut easily; not sharp.

As a verb dull is

to render dull; to remove or blunt an edge or something that was sharp.

Thoughtless is a related term of oblivious.

As adjectives the difference between thoughtless and oblivious

is that thoughtless is marked by or showing lack of due thought or care; careless while oblivious is (usually followed by to'' or ''of ) lacking awareness; unmindful; unaware, unconscious of.

Careles is a related term of thoughtless.

As an adjective thoughtless is

marked by or showing lack of due thought or care; careless.

As an adjective thoughtless

is marked by or showing lack of due thought or care; careless.

As a noun fecklessness is

the state of being feckless.

As adjectives the difference between thoughtless and frivolous

is that thoughtless is marked by or showing lack of due thought or care; careless while frivolous is silly, especially at an inappropriate time or in an inappropriate manner.

Mindless is a related term of thoughtless.

As adjectives the difference between mindless and thoughtless

is that mindless is showing a lack of forethought or sense while thoughtless is marked by or showing lack of due thought or care; careless.

As adjectives the difference between senseless and thoughtless

is that senseless is bereft of feeling or consciousness; deprived of sensation; unconscious; insensible while thoughtless is marked by or showing lack of due thought or care; careless.