thoughtful

As a noun contemplation

is the act of the mind in considering with attention; continued attention of the mind to a particular subject; meditation; musing; study.

As an adjective thoughtful is

demonstrating thought or careful consideration.

Vigilant is a related term of thoughtful.

As adjectives the difference between vigilant and thoughtful

is that vigilant is watchful, especially for danger or disorder; alert; wary while thoughtful is demonstrating thought or careful consideration.

Discreet is a related term of thoughtful.

As adjectives the difference between discreet and thoughtful

is that discreet is respectful of privacy or secrecy; quiet; diplomatic while thoughtful is demonstrating thought or careful consideration.

As adjectives the difference between wise and thoughtful

is that wise is showing good judgement or the benefit of experience while thoughtful is demonstrating thought or careful consideration.

As a verb wise

is to become wise.

As a noun wise

is way, manner, method.

As an acronym WISE

is acronym of wing-in-surface effect|lang=en.

As adjectives the difference between candid and thoughtful

is that candid is impartial and free from prejudice while thoughtful is demonstrating thought or careful consideration.

As a noun candid

is a spontaneous or unposed photograph.

Thoughtful is a synonym of cautious.

As adjectives the difference between cautious and thoughtful

is that cautious is careful; using or exercising caution; tentative while thoughtful is demonstrating thought or careful consideration.

As a verb considered

is past tense of consider.

As an adjective thoughtful is

demonstrating thought or careful consideration.

As adjectives the difference between sensible and thoughtful

is that sensible is perceptible by the senses while thoughtful is demonstrating thought or careful consideration.

As a noun sensible

is sensation; sensibility.

As adjectives the difference between thoughtful and calculated

is that thoughtful is demonstrating thought or careful consideration while calculated is produced by calculation.

As a verb calculated is

past tense of calculate.

As adjectives the difference between lazy and thoughtful

is that lazy is unwilling to do work or make an effort while thoughtful is demonstrating thought or careful consideration.

As a verb lazy

is to laze, act in a lazy manner.