Organ vs Part

When to use each in English, with meaning, register, and examples.

Organ

Top 2,000 (common) B2 noun

Part

Top 1,000 (very common) A1 noun

Most common: Part

	Organ	Part
Pronunciation	🇬🇧 /["/ˈɔːɡən/"]/ 🇺🇸 /["/ˈɔːrɡən/"]/ Hear Organ	🇬🇧 /["/pɑːt/"]/ 🇺🇸 /["/pɑːrt/"]/ Hear Part
Meaning	A part of the body that has a specific function, like heart or lungs.	A piece or segment of something.
Example	The heart is a vital organ that pumps blood throughout the body.	She plays a significant part in the school play.
Register	Neutral	Neutral
How common	Top 2,000 (common)	Top 1,000 (very common)
CEFR level	B2	A1
Part of speech	noun	noun
Collocations	internal, bodily, important, donate, transplant, harvest, donation, donor, transplant, pipe, electric, Hammond™, pedal, pipe, stop, pipe, electric, Hammond™, pedal, pipe, stop, central, major, administrative	big, good, greater, comprise, constitute, fall into, in part, part of, the parts of the body, foreign parts, private parts, big, good, greater, comprise, constitute, fall into, in part, part of, the parts of the body, foreign parts, private parts, big, good, greater, comprise, constitute, fall into, in part, part of, the parts of the body, foreign parts, private parts, big, good, greater, comprise, constitute, fall into, in part, part of, the parts of the body, foreign parts, private parts, replacement, spare, auto, manufacture, assemble, parts dealer, parts maker, parts supplier, big, good, greater, comprise, constitute, fall into, in part, part of, the parts of the body, foreign parts, private parts, big, good, greater, comprise, constitute, fall into, in part, part of, the parts of the body, foreign parts, private parts, big, bit, small, act, have, play, in the part, part of, act the part, dress the part, look the part, big, huge, leading, have, do, play, part in, big, bit, small, act, have, play, in the part, part of, act the part, dress the part, look the part
Antonyms	dysfunction, disorder	whole, entirety, total
Common mistakes	Confused with 'organism' which refers to living things., Using 'organs' as a verb incorrectly, not acknowledging its noun form only., Assuming 'organ' pertains only to body parts, missing broader meanings.	Using 'parts' when referring to a single piece., Confusing 'part' with 'share' in certain contexts., Misplacing 'part' in compound phrases, such as 'part time' to 'time part'.
Usage notes	Used in both medical and general contexts. In casual conversation, 'organ' can refer to musical instruments or an important part of a system.	Use 'part' for referring to a section of a whole. It's appropriate in both spoken and written language, but more formal contexts may prefer 'component' or 'element'.

Frequently asked questions: Organ vs Part

What's the difference between Organ and Part?

Organ: A part of the body that has a specific function, like heart or lungs. Part: A piece or segment of something.

Which is more common: Organ and Part?

Part is the most common in everyday English.

Are Organ and Part the same CEFR level?

Organ: B2, Part: A1 on the CEFR scale.

Can I use Organ and Part interchangeably?

Not always. Organ and Part are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.