ear
er
eer
oddball
100

Fear

to be afraid of something

100

perch

a place where a bird my stay and observe 

100

Deer

a quadruped that inhabits the forrest

100

learn

to absorb and understand new information

200

spear

a long weapon with a point

200

fern

a leafy, low lying type of plant 

200

steer

guiding or moving an object in a particular direction

200

heard

to hear something 

300

ear

the exterior organ for hearing 

300

clerk

a store attendant 

300
jeer

to make fun of or insult 

300

Earth

our planet

400

rear

behind

400

herd

a large group of the same animal 

400

peer

to look closely and keenly

500

dear

a method with which to address someone in a letter or formally 

500

germ

microscopic organisms that inhabit every surface on Earth