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

independence
n. 1 freedom, liberty, autonomy, sovereignty, self-rule, home
rule, self-determination, self-government, self-direction,
autonomy, autarchy: The colony gained independence from
Portugal. 2 confidence, self-confidence, self-sufficiency,
self-reliance, self-assurance: Edwina asserted her independence
by taking over the company herself.
independent
adj. 1 free, self-governing, autonomous, sovereign: In 1829
Greece was acknowledged as an independent state. 2
unrestrained, unrestricted, unfettered, untrammelled,
unregulated, uncontrolled, separate(d), unconnected,
disconnected, unrelated, distinct: Air is made up of
independent particles. 3 self-reliant, self-sufficient,
self-assured, (self-)confident, bold, individualistic,
competent: For a six-year-old, he is very independent. 4
voluntary, non-partisan, spontaneous, unsolicited, unbidden,
unprejudiced, unbiased, non-aligned, unaligned, disinterested,
neutral: Four independent witnesses testified to seeing him at
the scene of the crime. 5 unlimited, unrestricted, affluent,
self-sufficient; unearned: She is a woman of independent means.
6 unallied, unaffiliated, uncommitted, individualistic,
undecided: Independent candidates outnumber those of the two
main parties in this election. 7 outside, external,
unaffiliated, non-affiliated, unconnected, disinterested: An
independent auditor was engaged to go over the company's books.
8 independent of. irrespective of, disregarding,
notwithstanding, ignoring, excluding; exclusive of, except for,
barring, apart from, besides, beyond, US aside from: He insists
on doing things his way, independent of others' feelings.
Independent of you and me, no one cares what he does.
--n. 9 individual, nonconformist, maverick, Colloq loner: He
is an independent, not affiliated to any political party.
indestructible
adj. durable, long-lasting, everlasting, eternal, endless,
perennial, permanent, fixed, unchanging, changeless,
unchangeable, indelible, ineradicable, inextirpable, immutable,
unalterable, constant, undying, non-perishable, imperishable;
unbreakable, non-breakable, shatter-proof: The problem is that
many plastics are virtually indestructible.