Feather is to bird as fur is to ...
mammal
Gasoline is to car as food is to ...
human
Heart is to love as brain is to ...
think
Glasses are to eyes as headphones are to ...
ears
Wheel is to bicycle as oar is to ...
rowboat
Roots are to plants as foundation is to ...
building
Sail is to sailboat as wing is to ...
airplane
Glove is to hand as sock is to ...
foot
Umbrella is to rain as sunscreen is to ...
sun
Moon is to night as sun is to ...
day
Water is to river as sand is to ...
desert (or beach)
Petal is to flower as leaf is to ...
tree
Fuel is to fire as oxygen is to ...
life
Engine is to car as heart is to ...
human
Key is to lock as password is to ...
computer
Keyboard is to computer as steering wheel is to ...
car
Tires are to car as shoes are to ...
feet
Pen is to writing as paintbrush is to ...
painting
Honey is to bee as milk is to ...
cow
Chef is to kitchen as conductor is to ...
orchestra
Tree is to forest as star is to ...
galaxy (or space)