Gymnastic
Fantastic
Tic-Tac-tic
ecclesiastic
Peripatetic
apathetic.
Best wishes,
Jerry
characteristic
periprosthetic
Why was I expecting ‘erotic’?? 
Earl Bostic
Frantic antic
(there’s a silly new movie out called “The Perfect Man,” which has a “tic” segment of this sort.)
Gnostic heretic.
pedantic
OH!! Thought of another one (is that against the rules?)
Romantic
Angelic music
Uhm, Cynth, there’s no -tic in “Angelic music.” Have another morning coffee on me 
OH 
I thought I was being so clever too. Dang! I’ll be back! I just noticed NEITHER word has -tic.
Ask Emily and Bloomfield about my first limerick. There’s a pattern here.
Elastic plastic
Hope that wasn’t too traumatic!
Using my brain is always traumatic!