What is the difference between a hat and a cap?

Help me fix a stupid argument, but I had warmed up this weekend. (And no for the first time, actually.) are "hat" and "cap" synonyms, are covers of a certain type of hat or are two distinct, different types of head wear?

A cap fits over the head and is made of soft material. It has a wing, although it can have a viewfinder, like a baseball cap. There are also the caps worn by the Jewish faith and the pope. One always has a wide-brimmed hat and is shaped in different ways, but not "embrace" the shape of his head a cap made. It is usually made of a stronger material and usually used outdoors for protection from the elements.

Stripe Crochet Beanie Cap Hat

Ball Cap Buddy Hat Washer $4.99 Now it’s easier than ever to clean soiled baseball caps; just toss them in the washing machine. This handy Cap Washer protects your hat in the washing machine and holds its shape so your baseball hat comes out looking like new. Perfect for use on ball caps visors and wool caps. The Baseball Cap Washer features durable plastic construction that stands up to wash after wash. The specially designed…

CapRack 36 (Black) (60 H x 4 W x 4.5 D) $17.95 Display a total of 36 caps on this versatile over-the-door cap rack! The 5-foot cord allows multiple placement options, while the innovative clips can be spaced anywhere along the cord, for unlimited display options. This hat rack may be hung over a door, on a wall, looped over a closet rod, and even hung from the ceiling. Use it in the living room, bedroom, den, or garage – it’s also perfect f…

CAP RACK 18 $10.29 The Perfect Curve BagRack18 is perfect for storing, displaying and organizing up to 18 handbags. > Holds up to 18 handbags > Two racks allows for use in two different rooms > Hangs over a door > Each hook is adjustable,up and down > Fits both residential (1.50) and commercial (1.75) sized doors > Adjustable to fit different height doors from 72 to 82 > No assembly required!…

Australian Tour Baseball Cap …

Bio-Domes Headgear Baseball Cap One Size Fits Most $37.68 Bio-Domes Headgear baseball cap features design and Cypress Hill stitched on front. Fabric: 98% Cotton – 2% Spandex – Suede…

Adi Designs Women’s Studded Brim Military Cap $17.99 Show your individual style with a military-style hat by Adi DesignsCap boasts shining rhinestone and metallic accentsWomen’s accessory features an accent band

Adidas Men’s ‘Wounded Warrior Project*’ Baseball Cap $15.99 Keep the sun out of your eyes and off your head with a baseball capMen’s hat displays the ‘Wounded Warrior Project’ emblem All net proceeds from the sale of this product go directly to ‘Wounded Warrior Project.*’

Adi Designs Soft-brim Lined Cap $17.99 Show off your individual taste with this military-style cap by Adi designsHat boasts fashionable solid color or patterned fabricsWomen’s accessory features back elastic for a comfortable fit

Hat – Motorcycle biker Cap $12.95 HAT -

Hat – Captain / Yacht Cap $10.95 Your’e in charge of the ship in this authentic styled Captian’s cap.

DC – Cap Star Hat (Navy) – Hats $28 Zappos.com is proud to offer the DC – Cap Star Hat (Navy) – Hats: Wrap your dome in the DC Cap Star Hat. ; Stretch FlexFit design. ; DC logo embroidery at front. ; 100% cotton twill.

DC – Cap Star Hat (Grey) – Hats $30 Zappos.com is proud to offer the DC – Cap Star Hat (Grey) – Hats: Wrap your dome in the DC Cap Star Hat. ; Stretch FlexFit design. ; DC logo embroidery at front. ; 100% cotton twill.

DC – Cap Star Hat (Royal Blue) – Hats $30 Zappos.com is proud to offer the DC – Cap Star Hat (Royal Blue) – Hats: Wrap your dome in the DC Cap Star Hat. ; Stretch FlexFit design. ; DC logo embroidery at front. ; 100% cotton twill.