threat _noun

1-) expression of intention to do harm/punish

ADJECTIVES

dire, terrible
empty, idle
implied, veiled
explicit
physical, violent
verbal
bomb, death, suicide

VERBS

issue, make, utter
receive
carry out
lift, withdraw
reduce
give in to

PREPOSITIONS

against

2-) possible danger

ADJECTIVES

big, considerable, dangerous, deadly, grave, great, major, real, serious, significant 
main
growing, increasing
constant, continual, continuous, ever-present, permanent
renewed
direct, immediate, imminent
insidious
long-term, short-term
potential
apparent, perceived
external
physical
political
environmental
military, nuclear, terrorist

VERBS

be, pose, present, represent
consider sth (as), perceive sth as, regard sth as, see sth as, view sth as
face, meet

PREPOSITIONS

under
from
of
to