system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is "nonchalant" a word, but "chalant" is not? Are there other English words like this?
gpt
See the other answers for nonchalant/chalant.

There are other English words  like this; they're called *unpaired words*. They include:

* debunk
* defenestrate
* dejected
* disconsolate
* disdain
* disgruntled
* dishevelled
* dismayed
* disrupt
* feckless
* gormless
* impetuous
* impromptu
* inane
* incessant
* inchoate
* incognito
* incommunicado
* indomitable
* ineffable
* inept
* inert
* infernal
* inhibited
* insidious
* insipid
* insouciant
* intact
* invert
* misgivings
* misnomer
* nonchalant
* noncommittal
* nondescript
* nonpareil
* nonplussed
* unbeknownst
* ungainly
* unswerving
* untold
* untoward

EDIT: thanks for the gold!