n. 1
An excessive amount of something.
A surfeit of wheat is driving down the price.
n. 2
Overindulgence in either food or drink; overeating.
v. 1
To overeat or feed to excess (on or upon something).

Forms

Plural: surfeits → gluts, overabundances, excesses, superabundances…
Past participle: surfeited
e.g. surfeited → over-indulged, satiated, indulged, sated…

Choose the right word

Surfeit or Cloy?

To cloy or surfeit is to gratify to the point of revulsion or disgust.

J. C. Fernald, English Synonyms and Antonyms (1914)

excess The load of the truck was in excess of three tons.
glut There was a glut of cotton goods due to cheap imports.
overabundance I read the article "An Overabundance of Low-density Neptune-like Planets."
nausea I experience nausea when I go on too many rides.
oversupply There is a chronic oversupply of rice in Japan.

Use in printed books, per decade from 1850 to 2019.

2 letters: ug
4 letters: pall¹, glut¹, sate¹, cloy¹
5 letters: stuff¹, gorge¹
6 letters: excess², nausea³
7 letters: satisfy³, surplus², indulge², satiety⁴, satiate, engorge, nimiety
8 letters: plethora³, fullness², gluttony³, overfeed³
9 letters: abundance³, repletion, overgorge
10 letters: overeating⁴, overcharge³, oversupply⁴
11 letters: superfluity
12 letters: overfullness
13 letters: overabundance⁵
14 letters: overindulgence, superabundance

The small number after each word is its number of syllables (excess² = 2 syllables).