Nouns

(n)stilla static photograph (especially one taken from a movie and used for advertising purposes)“he wanted some stills for a magazine ad”
(n)hush, stillness, still(poetic) tranquil silence“the still of the night”
(n)stillan apparatus used for the distillation of liquids; consists of a vessel in which a substance is vaporized by heat and a condenser where the vapor is condensed
(n)distillery, stilla plant and works where alcoholic drinks are made by distillation

Verbs

(v)calm, calm down, quiet, tranquilize, tranquillize, tranquillise, quieten, lull, stillmake calm or still“quiet the dragons of worry and fear”
(v)hush, quieten, silence, still, shut up, hush upcause to be quiet or not talk“Please silence the children in the church!”
(v)still, allay, relieve, easelessen the intensity of or calm“The news eased my conscience”, “still the fears”
(v)stillmake motionless

Adjectives

(s)inactive, motionless, static, stillnot in physical motion“She remained motionless, yet poised to take flight”
(s)silent, soundless, stillmarked by absence of sound“a silent house”, “soundless footsteps on the grass”, “the night was still”
(s)placid, quiet, still, tranquil, smooth, unruffled(of a body of water) free from disturbance by heavy waves“a ribbon of sand between the angry sea and the placid bay”, “the quiet waters of a lagoon”, “a lake of tranquil blue water reflecting a tranquil blue sky”, “a smooth channel crossing”, “scarcely a ripple on the still water”, “unruffled water”
(a)stillused of pictures; of a single or static photograph not presented so as to create the illusion of motion; or representing objects not capable of motion“a still photograph”, “Cezanne's still life of apples”
(a)still, noneffervescentnot sparkling“a still wine”, “still mineral water”
(s)stillfree from noticeable current“a still pond”, “still waters run deep”

Adverbs

(r)stillwith reference to action or condition; without change, interruption, or cessation“it's still warm outside”, “will you still love me when we're old and grey?”
(r)however, nevertheless, withal, still, yet, all the same, even so, nonetheless, notwithstanding, at the same timedespite anything to the contrary (usually preceding a concession)“although I'm a little afraid, however I'd like to try it”, “while we disliked each other, nevertheless we agreed”, “he was a stern yet fair master”, “granted that it is dangerous, all the same I still want to go”
(r)even, yet, stillto a greater degree or extent; used with comparisons“looked sick and felt even worse”, “an even (or still) more interesting problem”, “still another problem must be solved”, “a yet sadder tale”
(r)still, stock-stillwithout moving or making a sound“he sat still as a statue”, “time stood still”, “they waited stock-still outside the door”, “he couldn't hold still any longer”