There are 17 words that end with 'onomy'.
| bionomy | economy |
| isonomy | autonomy |
| aeronomy | agronomy |
| taxonomy | theonomy |
| astronomy | taphonomy |
| teleonomy | diseconomy |
| heteronomy | gastronomy |
| subeconomy | cytotaxonomy |
| chemotaxonomy | |
Note: These 17 words that end with 'onomy' are found from the USA & Canada version of the tournament Scrabble word list.