Atonmy.
The heart.
The Kidneys
heart
An organ.
Yes, the word ovaries, the plural for for ovary, is a noun, a word for an organ of the body, a word for a thing.
If you add one letter to the word "organ," it becomes "organ" + "i" = "organi," which isn't a valid word. However, if we consider the context of the question, adding a letter to "organ" can form the word "organs," pluralizing it to refer to multiple body organs. Alternatively, if you're looking for a specific organ like "heart" and add "h," it becomes "heart" + "h" = "hearth."
A homograph is a word that is spelled the same as another word but has a different meaning. An example is "bow," which can refer to a weapon or a gesture of respect. An organ is a part of a living organism that performs a specific function.
· lung · womb
gall bladder
blood, organ, heart, liver, lungs
The kidney is an organ in the body that filters the blood and creates urine.
Tissue.