Categories of Terms Below:

Targeted Age
Toothbrush Type
Bristle tuft patterns
Bristle Materials
Handle Materials
Packaging

Targeted Age:

Baby (newborn to 24 months)
Child (2 to 6 years)
Youth (7 to 11 years)
Teen (13-19 years)
Adult (20 to 70 years)
Geriatric (over 70 years)

Toothbrush Type:

Advertising
Airline
Angled (bristle/tuft shape)
Anthropomorphic (human-shaped)
Antique (older than 100 years)
Battery-powered
Blobby (handle shape)
Capped (replaceable bristle cover)
Chew sticks (Use also Vernacular)
Circular (head or bristle pattern shape) (Use also Round
Conceal-reveal (Use also Floaty)
Contour (handle shape)
Cover attaches as handle 
Covered (use capped)
Curved handle shape
Cushioned (handle)
Cylindrical (all round head shape)
Denture
Designer
Discount
Disposable
Dual-part handle (handle carries toothpaste or water)
Dual-heads (two-sided head)
Easy grip (according to packaging)
Economy pak
Electric (rechargeable)
Elongated head
Ergonomic (handle shape)
Flat (handle shape)
Flexible neck
Floaty (Use also conceal-reveal. Include what floats, eg. Bear)
Flossing (for thinner, taller bristles)
Footed (Use also Standing)
Foreign (non-American brand)
Folding
Hand carved
Hand wrapped
Hole at end
Hotel
Ionic (powered by negative ions)
Licensed character (Cinderella, Shrek etc. Include character name)
Manual
Musical (include song/tune)
Non-slip grip
Novelty
Nude (handle. Use also Anthropomorphic
Ordinary (means domestic plain)
Oval Head
Padded Head
Personalized (handle)
Plastic
Prepasted (Use also Toothpaste, embedded)
Rectangular head
Recyclable
Recycled (name material)
Replaceable head
Rotating head (Use also Circular)
Rounded (handle shape)
Rubber
Self-contained (carries paste)
Singing
Sonic (high-speed)
Square head
Stamped (Use also personalized)
Timed (include duration in minutes)
Tapered (handle shape)
Toothpaste, embedded (in bristles)
Toothpaste, integrated (into handle)
Tongue Scraper
Toy
Trapezoid-shaped head
Travel
Serpentine (Use also Zig Zag)
Short handle
Soft grip (handle)
Standing (Use also footed)
Stimulator tip
Suction cup base
Tapered (handle shape)
Three-heads (three-sided)
Thumb grip
Ventilated (refers to cap)
Vernacular (Use also chew sticks)
Vintage (less than 100 years)
Wood
Zig Zag (Use also Serpentine)
Zoomorphic (animal-shaped; Include animal type

Bristle tuft patterns:

Cross trim bristles
Cushion trim bristles
Diagonal bristles
Diamond rounded filaments
Drop shaped bristles
Dome trim bristles
Dual length (use also flossing)
Flat bristles (use for straight cut tops)
Flossing (multi-height & thickness)
Multi-height bristles
Multi-width bristles
Outer angled bristles
Sawtooth bristles (repeating Vs)
Wave-like bristles

Bristle Materials:

Boar bristles
Indicator bristles 
Latex bristles
Natural bristles (include material)
Nylon bristles
Plastic bristles
Rounded tip bristles
Rubber bristles

Handle Materials:

Dollar bills
Enamel handle
Metal handle
Paper handle
Plastic handle
Recycled handle
Steel handle
Stone handle
Wood handle

Packaging:

Blister package
Boxed package
Bucket package
Cannister package
Cardboard package
Envelope package
Paper package
Plastic Wrap package
Tear ‘n Go package
Textile package
Ventilated package
2-pak
3-pak
4-pak
6-pak…
Economy pak
Multi-pak