The Oxford Thesaurus An A-Z Dictionary of Synonyms INTRO ...

This is an instant soup - just add hot water to the powder.
instantaneously
adv. instantly, immediately, at once, (right) now, directly,
forthwith, promptly, this minute or second or instant, without
delay, tout de suite, instanter, Brit straight away or US right
away; Colloq pronto, US momentarily: The results will be beamed
instantaneously to 176 million people around the world.
instead adv. 1 as an alternative or a substitute: She wanted me to go
but I stayed instead. 2 instead of. alternatively, preferably,
in preference to, in place of, in lieu of, rather than, as a
substitute for; as contrasted with, as opposed to: Instead of
going to the cinema we went to the theatre.
instil v. instill, imbue, inculcate, infuse, ingrain or engrain,
implant; insinuate, impart: From childhood a sense of justice
was instilled in us.
instinct n. intuition, feel, feeling, empathy, sensitivity, tendency,
propensity, leaning, bent, skill, talent, faculty, sixth sense,
knack, predisposition, capacity, aptitude; subconscious: She
has an uncanny instinct for finding the most interesting person
in a crowd.
instinctive
adj. 1 instinctual, intuitive, natural, innate, native, inborn,
inbred, congenital, constitutional, reflex, visceral,
intestinal, intrinsic, intuitional, subconscious, Colloq gut:
She has an instinctive flair for design. 2 immediate,
involuntary, irrational, mechanical, automatic, spontaneous:
Harvey took an instinctive dislike to Percy when they met.
institute n. 1 society, organization, association, league, alliance,
guild: They tried to establish an institute for research on
badgers. 2 See institution, 2.
--v. 3 establish, found, launch, organize: The principles of
sportsmanship were instituted on the playing fields of England.
4 inaugurate, introduce, initiate, set up, start, begin,
originate, commence, pioneer: If you do not pay, we shall be
obliged to institute proceedings against you.