hazardous

As adjectives the difference between accidental and hazardous

is that accidental is not essential; incidental, secondary while hazardous is risky, dangerous, with the nature of a hazard.

As a noun accidental

is a property which is not essential; a nonessential; anything happening accidentally.

As adjectives the difference between hazardous and destructive

is that hazardous is risky, dangerous, with the nature of a hazard while destructive is causing destruction; damaging.

As adjectives the difference between hazardable and hazardous

is that hazardable is liable to chance or hazard; exposed to dangers; risky or uncertain while hazardous is risky, dangerous, with the nature of a hazard.

As adjectives the difference between hazardous and casual

is that hazardous is risky, dangerous, with the nature of a hazard while casual is happening by chance.

As a noun casual is

(british|nz) a worker who is only working for a company occasionally, not as its permanent employee.

As adjectives the difference between hazardous and parlous

is that hazardous is risky, dangerous, with the nature of a hazard while parlous is attended with peril; dangerous; risky.

As an adverb parlous is

very, extremely.

As an adjective hazardous

is risky, dangerous, with the nature of a hazard.

As a noun jeopardy is

danger of loss, harm, or failure.

As adjectives the difference between noxious and hazardous

is that noxious is harmful; injurious while hazardous is risky, dangerous, with the nature of a hazard.

As adjectives the difference between hazardous and hostile

is that hazardous is risky, dangerous, with the nature of a hazard while hostile is belonging or appropriate to an enemy; showing the disposition of an enemy; showing ill will and malevolence, or a desire to thwart and injure; occupied by an enemy or enemies; inimical; unfriendly.

As a noun hostile is

an enemy.

As adjectives the difference between hazardous and treacherous

is that hazardous is risky, dangerous, with the nature of a hazard while treacherous is exhibiting treachery.

Foolhardy is a related term of hazardous.

As adjectives the difference between foolhardy and hazardous

is that foolhardy is marked by unthinking recklessness with disregard for danger; bold but rash; hotheaded while hazardous is risky, dangerous, with the nature of a hazard.