Answer:
The letter S is added to pluralise most words in the English language. eg. Letter to Letters Word to Words and Language to Languages. But I am a word that is pluralised with the addition of the letter C.
I am the type of room you cannot enter or leave. Raise from the ground below I could be poisonous or a delicious treat.
If I drink, I die. If I eat, I am fine. What am I?
What goes up but never comes down?
I have hands but cannot clap. What am I?
Runs over fields and woods all day. Under the bed at night sits not alone, With long tongue hanging out, Resting at your feet until we go for a walk