Synonyms of the word

precarious

• adj. (comparable) Dangerously insecure or unstable; perilous.
• adj. (law) Depending on the intention of another.
• adj. (dentistry) Relating to incipient caries.

dangerous

• adj. Full of danger.
• adj. Causing danger; ready to do harm or injury.
• adj. (colloquial, dated) In a condition of danger, as from illness; threatened with death.
• adj. (obsolete) Hard to suit; difficult to please.
• adj. (obsolete) Reserved; not affable.

insecure

• adj. Not secure.
• adj. Not comfortable or confident in oneself or in certain situations.

parlous

• adj. Attended with peril; dangerous; risky.
• adj. Dire, terrible, appalling.
• adj. (obsolete) Dangerously clever or cunning.
• adv. (archaic) Very, extremely.

perilous

• adj. Dangerous, full of peril.

shaky

• adj. Shaking or trembling.
• adj. Nervous; Anxious.
• adj. (of wood) Full of shakes or cracks; cracked.
• adj. Easily shaken; tottering; unsound.

touch-and-go

• adj. Alternative form of touch and go.
• n. (aviation) A landing on a runway immediately followed by a takeoff without an intervening full stop.

uneasy

• adj. (rare) Not easy; difficult.
• adj. Restless; disturbed by pain, anxiety.
• adj. Not easy in manner; constrained; stiff; awkward; not graceful.
• adj. Causing discomfort or constraint.

unsafe

• adj. Not safe; dangerous.

unstable

• adj. Having a strong tendency to change.
• adj. Fluctuating; not constant.
• adj. Fickle.
• adj. Unpredictable.
• adj. (chemistry) Readily decomposable.
• adj. (physics) Radioactive, especially with a short half-life.
• v. (transitive) To release (an animal) from a stable.