what are the difference between one-hit/flinched kill?

what are the difference between one-hit kill / one-flinched kill/ sticky kill...etc?

my english really not good, i have found the meaning in dictionary, but i still cannot know what are the difference, please tell me ><

or tell me real meaning of flinched and sticky, please

1-hit kill: one hit of that particular weapon or attack type (kick, throw, smash, normal, etc.) and the mob/boss is dead.
1-Flinch: Just needs one hit to break off the part (usually made with sticky bombs).
Sticky Kill: I believe you mean Sticky Bomb, they are used to break off parts of break-off-able bosses and they don't need to be accurate (eg: spears). You throw the bomb at the boss or anywhere in the room and BOOM, there goes your break off.