infomercial vs informercial

infomercial and informercial both are nouns.

Word	Noun	Adjective	Verb	Adverb
infomercial	Yes	No	No	No
informercial	Yes	No	No	No

As nouns, infomercial and informercial are synonyms defined as:

infomercial and informercial: a television commercial presented in the form of a short documentary

infomercial (noun)	informercial (noun)
a television commercial presented in the form of a short documentary	a television commercial presented in the form of a short documentary