Active (alert) is an antonym of
somnolent (sleepy; drowsy).

The words asphyxiate (suffocate)
and breathe are antonyms.

The secondary meaning of the word outfit
is a group of people undertaking a particular
activity together. The word organization also
means the same.

Vituperate meaning blame or insult (someone)
in strong or violent language.Its opposite will be praise.

Convivial means friendly, lively, and enjoyable.

Epitomize meaning be a perfect example of
Exemplify meaning be a typical example of.

Innocuous means completely harmless,
not dangerous

Foment means to incite, promote growth of

Luminous means radiating or reflecting light, or glowing
Brittle means hard but liable to break easily.
Dim means dark or dull

Malodorous means to have a bad smell
Fragrant means smelling sweet or delicate
Acrid means unpleasantly bitter or pungent.