detrimental

As adjectives the difference between detrimental and lethal

is that detrimental is causing damage or harm while lethal is deadly; mortal; fatal.

As a noun lethal is

(chemistry) one of the higher alcohols of the paraffine series obtained from spermaceti as a white crystalline solid.

As adjectives the difference between detrimental and deadly

is that detrimental is causing damage or harm while deadly is subject to death; mortal.

As an adverb deadly is

fatally, mortally.

As adjectives the difference between catastrophic and detrimental

is that catastrophic is of or pertaining to a catastrophe while detrimental is causing damage or harm.

Noxious is a synonym of detrimental.

As adjectives the difference between detrimental and noxious

is that detrimental is causing damage or harm while noxious is harmful; injurious.

As adjectives the difference between unfavourable and detrimental

is that unfavourable is not approved of while detrimental is causing damage or harm.

Detrimental is a related term of difficult.

As adjectives the difference between detrimental and difficult

is that detrimental is causing damage or harm while difficult is hard, not easy, requiring much effort.

As a verb difficult is

(obsolete|transitive) to make difficult; to impede; to perplex.

As adjectives the difference between unhealthy and detrimental

is that unhealthy is characterized by, or conducive to poor health while detrimental is causing damage or harm.

As adjectives the difference between detrimental and antagonistic

is that detrimental is causing damage or harm while antagonistic is contending or acting against; as, antagonistic forces.