Carcinogen

#063
CARCINOGEN
- A cancer-causing substance or agent.

A warning sign on Container. 

Usage / Example :
- Cigarette smoke contains known carcinogens.
- Retailers failing to warn of carcinogen in baby items, group says.

Kangaroo Words

#062
A kangaroo word is a word that contains letters of another word, in order, with the same meaning.

The etymology of the phrase kangaroo word is from the fact that kangaroos carry their young (known as joeys) in a body pouch.
Likewise, kangaroo words carry their joey words within themselves.

Twin kangaroos words - kangaroo words that contains two synonyms within.
Anti-kangaroo words - kangaroo words that contains its antonym

Examples : 
masculine has  male within
observe has see within.
encourage  has urge within
plagiarist has liar within
supervisor has superior within
capable has able