20 words 

Ambidextrous

Able to use both hands equally well

Plaintive

expressing sorrow; mournful

Tapered

Becoming thinner towards one end

Repose

The state of being at rest; freedom from activity

Apex

The highest point; summit

imminent

likely to occur at any moment; impending

Vertiginous

Causing vertigo; dizzy or dizzying

Plethora

Large ammount or excess of something

Illegible

Not clear enough to be read

Inedible

Unfit to be eaten

End of medium words

Hard words

Anodyne

a medicine that alleviates pain

Topiary

A garden with fantastically clipped shrubs

Vitreous

pertaining to or made of glass

Atelier

a studio or workshop, especially that of an artist

Minatory

threatening or menacing

Abecedarian

one who is learning the alphabet

Rime

a coating of ice; frost

Deliquesce

to melt away

Efflugent

shining brilliantly; radiant

Efflorescent

Blooming or blossoming