rick·rack 
(rĭkrăk′)
(rĭkrăk′)n.
A flat narrow braid woven in zigzag form, used as a trimming for clothing or curtains.
[Reduplication of RACK1.]
- commemorate
- commemoration
- commemorative
- commemoratively
- commemorator
- commemoratory
- commence
- commencement
- commencer
- commend
- commendable
- commendably
- commendation
- commendatory
- commensal
- commensalism
- commensally
- commensurability
- commensurable
- commensurably
- commensurate
- commensurately
- commensuration
- comment
- commentarial