mad·cap 
(mădkăp′)
(mădkăp′)adj.
Behaving or acting impulsively or rashly; wild.
[MAD + CAP1, head.]
madcap′ n.
- circularizer
- circularly
- circular measure
- circular mil
- circular saw
- circulate
- circulating library
- circulation
- circulative
- circulator
- circulatory
- circulatory system
- circum-
- circumambience
- circumambiency
- circumambient
- circumambiently
- circumambulate
- circumambulation
- circumboreal
- circumcise
- circumciser
- circumcision
- circumduction
- circumference