Kangaroo Words

A kangaroo word is a word that contains letters of another word, in order, with the same meaning. For example: the word masculine contains the word male, which is a synonym of the first word. Similarly, the word observe contains its synonym see.

The origin of the word kangaroo words seems to be from the fact that just as the kangaroo animal, carries its baby in its body pouch, the kangaroo words carry their "baby" words within themselves

Here are some examples of kangaroo words taken from Wikipedia