It is; officially. In 1667, meaning 'frightening', terrific from Latin 'terrificus', 'causing terror'. Weakened sense of 'very severe', i.e. 'terrific headache' appeared in 1809. Colloquial sense of 'excellent' began 1888.
If horrific is akin horrible, why is terrific not akin to terrible?
akin
Akin's birth name is Akin Salawu.
"You are akin to your sister in terms of temperament."
Lacie Akin
"Akin" is an adjective. It is used to describe something that is similar or related in some way.
Sunay Akin's birth name is Skr Sunay Akin.
Todd Akin's birth name is William Todd Akin.
Curtis Akin's birth name is Curtis Eugene Akin.
Bedii Akin is 6'.
Todd Akin is a Republican.
Male child who wears a funnel on his head that shoots out steam or smoke and his transition thing- akin to Superman"s Up ,Up, and Away! was Bahp-Punk ( or Bunk) Bucketa bucketa Bucketa -Bing- I"m Tom Terrific, when he intoned this smoke or steam would issue from the funnel ( on his head, not a smokestack!) It was one of the silliest cartoons of all time, as was his superpower of imitating inanimate objects.