potent, powerful, strong, virulent
deadly, lethal
pure (usually figurative)
These words were pure poison to me.

nerve, rat
chemical

trace

administer, give sb, inject
lace sth with, put in, put on
She had laced his drink with poison.
She had put poison in his wine.

spread (figurative)
groups that are spreading the poison of sectarianism

put down (= put somewhere to kill animals)
The farmer had put down some rat poison.

drink, swallow, take
suck out
He sucked most of the poison from the wound.

gas, pill
arrow, dart

Poison is used with these nouns as the object:
atmosphere, mind, relation