DECADENT
(a) Deceased
(b) Disingenuous
(c) Deteriorating
(d) Belonging to the last decade

FACTITIOUS
(a) Amorous
(b) Causing dissension
(c) Controversial
(d) Artificial

STARTLED
(a) Jumped
(b) Shocked
(c) Surprised
(d) Offended

INDIGENOUS
(a) State-of-the-art
(b) Indigent
(c) Native
(d) Foreign

GUSTO
(a) Guts
(b) Enthusiasm
(c) Enjoyment
(d) Hope

VERACITY
(a) Forcefulness
(b) Simplicity
(c) Truthfulness
(d) Humour

SUSTENANCE
(a) Courage
(b) Nourishment
(c) Health
(d) Wisdom

RAPPORT
(a) Love and affection
(b) Full support
(c) Harmonious accord
(d) Sportsmanship

INTRUDE
(a) Fault
(b) Disagree
(c) Interrupt
(d) Leave

IMPERATIVE
(a) Negligible
(b) Indifferent
(c) Significant
(d) Urgent

GENIAL
(a) Generous
(b) Wonderful
(c) Liberal
(d) Friendly and cheerful