The humerus, or upper arm bone, has seven letters. It is the largest, and therefore the strongest, such bone. (The femur, or thighbone, only has five letters.)
If this is a riddle, it's possible that the answer was intended to be the cranium; but technically the cranium is a collection of eight separate bony plates surrounding the brain, and not a single bone in and of itself. Likewise with the jawbone, which is actually three bones: the mandible and maxillae.
I have to say the hardest thing about grade 7 is the bullying
Mandible (Jawbone) Humerus (Upper Arm Bone) Radius (Forearm Bone [Thumb to Elbow]) Ulna (Forearm Bone) Rib (Ribcage) Pelvis (Hip Bone) Femur (Thigh Bone) Tibia (Shin Bone) Fibula (Calf Bone) These are the major bones in the human body. Did you know that the pelvis is comprised of 5 - 7 individual bones? ~Apple Juice
There doesn't seem to be one. It seems to be discussing a body of water, but nothing seems to fit. Brook (5 letters) Creek (5 letters) River (5 letters) Stream (6 letters) "A stream" is 7 letters, but that is 2 words and has a space.
?
Science is a subject with 7 letters.
Civic
A peninsula is a body of land surrounded by water on all sides but one, and the word has 9 letters, but no hyphen.
7 letters in the word "letters".
Anchovy is an animal. It has 7 letters.
His bone will grow 7-10cm per year. This is cause by the hormone that is growing inside his body.
I'd say 'urethra', even though the positions of the letters don't match with the ones you gave, but it's 7 letters and it is a tube which connects the urinary bladder to the outside of the body, so I'm 99% sure of it that this is the word you are searching.
There are total of 7 letters in this word.