How to make diminutives?

Feather → Little feather
Word → Little word
Town → Little town
Stone → Little stone
Message → Little message
Lake → Little lake
Key → Little key
City → Little city
Tree → Little tree
Path → Little path
Door → Little door
Star → Little star
Company → Little company
Wire → Little wire
Bloom → Little bloom
Plant → Little plant
Ditch → Litte ditch
House → Little house
Leaf → Little leaf
Screen → Little screen
Pole → ittle pole
Window → Little window
Bird → Little bird