Synonyms of the word

vital

• adj. Relating to, or characteristic of life.
• adj. Necessary to the continuation of life; being the seat of life; being that on which life depends.
• adj. Invigorating or life-giving.
• adj. Necessary to continued existence.
• adj. Relating to the recording of life events.
• adj. Very important.
• adj. Containing life; living.
• adj. Capable of living; in a state to live; viable.

alive

• adj. Having life; living; not dead.
• adj. In a state of action; in force or operation; unextinguished; unexpired; existent.
• adj. Exhibiting the activity and motion of many living beings; swarming; thronged; busy.
• adj. Sprightly; lively; brisk.
• adj. Having susceptibility; easily impressed; having lively feelings, as opposed to apathy; sensitive.
• adj. (as an intensifier) out of all living creatues.

animated

• adj. Full of life or spirit; indicating animation; lively; vigorous.
• adj. Endowed with life.
• v. simple past tense and past participle of animate.

critical

• adj. Inclined to find fault or criticize; fastidious; captious; censorious; exacting.
• adj. Pertaining to, or indicating, a crisis or turning point.
• adj. Extremely important.
• adj. Relating to criticism or careful analysis, such as literary or film criticism.
• adj. (medicine) Of a patient condition involving unstable vital signs and a prognosis that predicts the condition…
• adj. Likely to go out of control if disturbed, that is, opposite of stable.
• adj. Of the point (in temperature, reagent concentration etc.) where a nuclear or chemical reaction becomes…
• n. A critical value, factor, etc.
• n. In breakdancing, a kind of airflare move in which the dancer hops from one hand to the other.

essential

• adj. Necessary.
• adj. Very important; of high importance.
• adj. (biology) necessary for survival but not synthesized by the organism, thus needing to be ingested.
• adj. Being in the basic form; showing its essence.
• adj. Really existing; existent.
• adj. (of a lamination of a 3-manifold) Such that each complementary region is irreducible, the boundary of…
• adj. (medicine) Idiopathic.
• n. A necessary ingredient.
• n. A fundamental ingredient.

indispensable

• adj. (ecclesiastical, obsolete) Not admitting ecclesiastical dispensation; not subject to release or exemption;…
• adj. (of duties, rules etc.) Unbendable, that cannot be set aside or ignored.
• adj. Absolutely necessary or requisite; that one cannot do without.
• n. A thing that is not dispensable; a necessity.
• n. (in the plural, colloquial, dated) Trousers.

live

• v. (intransitive) To be alive; to have life.
• v. (intransitive) To have permanent residence somewhere, to inhabit, to reside.
• v. (intransitive) To survive; to persevere; to continue.
• v. (intransitive, hyperbolic) To cope.
• v. (intransitive) To pass life in a specified manner.
• v. (transitive) To spend, as one's life; to pass; to maintain; to continue in, constantly or habitually.
• v. (transitive) To act habitually in conformity with; to practice; to exemplify in one's way of life.
• v. (intransitive) To outlast danger; to float (said of a ship, boat, etc).
• v. (intransitive, followed by "on" or "upon") To maintain or support one's existence; to provide for oneself;…
• v. (intransitive, informal) To make the most of life; to experience a full rich life.
• adj. (only used attributively) Having life; that is alive.
• adj. Being in existence; actual.
• adj. Having active properties; being energized.
• adj. Operational; being in actual use rather than in testing.
• adj. (engineering) Imparting power; having motion.
• adj. (sports) Still in active play.
• adj. (broadcasting) Seen or heard from a broadcast, as it happens.
• adj. Of a performance or speech, in person.
• adj. Of a recorded performance, made in front of an audience, or not having been edited after recording.
• adj. Of firearms or explosives, capable of causing harm.
• adj. (circuitry) Electrically charged or energized, usually indicating that the item may cause electrocution…
• adj. (poker) Being a bet which can be raised by the bettor, usually in reference to a blind or straddle.
• adj. Featuring humans; not animated, in the phrases “live actors” or “live action”.
• adj. Being in a state of ignition; burning.
• adj. (obsolete) Full of earnestness; active; wide awake; glowing.
• adj. (obsolete) Vivid; bright.
• adv. Of an event, as it happens; in real time; direct.
• adv. Of making a performance or speech, in person.

lively

• adj. Full of life; energetic.
• adj. Bright; vivid; glowing; strong; vigorous.
• adj. (archaic) Endowed with or manifesting life; living.
• adj. (archaic) Representing life; lifelike.
• adj. (archaic) Airy; animated; spirited.
• adj. (of beer) Fizzy; foamy; tending to produce a large head in the glass.
• n. (nautical) Term of address.
• adv. (obsolete) In a lifelike manner.
• adv. Vibrantly, vividly.