ADJ

addictive, carcinogenic, dangerous, harmful, hazardous, noxious, poisonous, radioactive, toxic
innocuous
Even innocuous substances can sometimes register a positive result in a drug test
banned, illegal
natural
a natural substance found in the body of animals
chemical
inorganic, organic
pure
soluble, volatile
crystalline, fatty, oily, slimy, sticky, viscous
medicinal

VERB + SUBSTANCE

use
contain
produce
Some frogs produce very toxic substances in their skin
take
The athletes had taken banned substances to increase their strength

ADJ

real
The real substance of the report was in the third part
added
His disappearance has given added substance to the argument that he stole the money

VERB + SUBSTANCE

have
The image of him that the media have presented has no substance
give sth, lend sth
The letters lent substance to the rumours
lack

PREP

in ~
There's no difference in substance between the two points of view
of ~
Nothing of substance was achieved at the meeting
without ~
Their allegations were without substance
~ in
There's no substance in the story
~ to
There was little substance to his claims