- square
- rectangular
- parallelogram
- box
- quadrilateral
- trapezoid
- diagonal
- rhombus
- squares
- cube
- right angle
- polygon
- oblong
- perpendicular
- lengthwise
- triangles
- translucent
- concave
- expanse
- edges
- foursquare
- shape
- l shaped
- oval shaped
- triangle
- indentation
- geometric shapes
- octagonal
- ellipse
- featureless
- angle
- curving
- hypotenuse
- baking dish
- baking pan
- vertices
- sloping
- blobs
- blocky
- checkerboard
- diagram
- parchment paper
- teardrop
- dot
- bisected
- cutouts
- quadrants
- sloped
- patty
- tiled
- cookie sheet
- u shaped
- spherical geometry
- touchpad
- parallel
- honeycomb
- elliptic geometry
- rows
- shapes
- angular
- oval
- hyperbolic geometry
- undulating
- cursor
- pleats
- trackpad
- boxy
- convex polygon
- contoured
- arches
- shaded
- backlit
- slits
- rectangles
- elliptical
- smiley face
- circular
- #.#cm
- scroll wheel
- alcove
- baking sheets
- silvery
- diagonally
- jagged
- swatches
- puff pastry
- curvature
- contours
- horizontally
- cubes
- squared
- cylindrical
- hexagonal
- curved
- spherical
- wavy
- slices
- horizontal
- squareness
- vertex
- elongated
- vertex arrangement
- squarish
- latin
- bezel
- blob
- semicircle
- squarely
- crescent
- petals
- conical
- vertically
- quadrate
- silhouette
- cutout
- contour
- orb
- lettering
- nonsquare
- lattice
- folds
- squarewise
- edge
- antiparallelogram
- geometric
- quadratic
- textured
- cubic
- quadrangle
- inch
- hexagon
- width
- equality
- side
- length
- shaped
- tesseract
- enclosing
- trapezoidal
- piazza
- carapace
- circumference
- hypercube
- centimeter
- diameter
- euclidean geometry
- parabola
- thick
- strips
- slab
- rect
- dots
- octagon
- stripe
- spaced
- micrometre
- sheaf
- dough
- layered
- encloses
- slivers
- thickness
- wedge
- prisms
- serrated
- symmetrical
- yellowish
- thin
- whitish
- crosswise
- ovoid
- slice
- symmetry
- chunks
- centimetre
- micrometer
- gelatinous
- millimeter
- vertical
- hairs
- 2-inch
- thread
- wrapper
- bounding
- clump
- four side
- crust
- overlaid
- wedge-shaped
- 1-inch
- shapen
- shaper
- badge
- toroidal
- cross-section
- square-shaped
- regular polygon
- reshape
- geometrical
- 9-inch
- pugilistic
- boxer
- pugilist
- hypergraph
- shapeless
- circle
- hexagons
- semicircles
- indentations
- dodecahedron
- polyhedron
- ogee
- umbels
- convex
- conic
- tetrahedron
- circlet
- isosceles
- lengthways
- flacon
- cuboid
- openwork
- oculus
- octahedron
- selvage
- figure
- dimple
- gnomon
- concavity
- cruciform
- lunette
- cartouche
- mullions
- spheroid
- pleat
- sconce
- pasteboard
- pilaster
- rosetta
- asterism
- 1/2-inch
- snuffbox
- featherweight
- casket
- cardboard
- 3-inch
- plaza
- bandbox
- crate
- matchbox
- boxwood
- coffer
- crescent-shaped
- square meal
- degree
- multiform
- cubism
- formation
- convexity
- coffin
- 3/4-inch
- shapely
- 8-inch
- reddish-brown
- straightness
- ring-shaped
- cone-shaped
- squircle
- 1/4-inch
- preshape
- blue-black
- middleweight
- unshaped
- conventional
- 2-kilometer
- morpho
- domeshaped
- prizefighter
- form
- topography
- shapelet
- shapable
- angularity
- dicebox
- foreshape
- slugger
- hod
- boxology
- line
- cubelike
- roughhew
- boxlike
- square circle
- if and only if
- supercube
- shapedness
- carpenter's square
- misshape
- waveshape
- unshape
- stashbox
- figurable
- boxful
- pugilism
- monomorphic
- transhape
- buxus
- embox
- boxout
- boist
- omniform
- imbox
- overshape
- autoboxing
- morphic
- boxboard
- autoboxed
- playbox
- preform
- userbox
- morphous
- geometric figure
- boxkeeper
- falciform
- sidebox
- farebox
- indention
- squiggle
- splodge
- widthwise
- octagons
- ramekin
- serifs
- bevels
- crosshatch
- semitransparent
- floret
- longways
- pushpin
- bundt
- piecrust
- pentagons
- gameboard
- swage
- tesserae
- ladyfingers
- countersink
- pankration
- crenellations
- checkerboards
- synclinal
- stipple
- plasmatic
- phyllo
- bullnose
- chamfer
- diagonals
- nubbin
- skybox
- efform
- beshape
- tacklebox
- winebox
- toruffle
- individuate
- abox
- shoebox
- shapechanger
- boxball
- letterbox
- giftbox
- milkcrate
- forshape
- rudist
- malleiform
- boxen
- stompbox
- feedbox
- zoomorphic
- square inch
- bace
- strongbox
- pancratium
- prizefight
- paintbox
- slipcase
- makedom
- biformed
- antiform
- vertex-transitive
- t square
- boxhaul
- on square
- boxload
- morphometrics
- ticky box
- boxaerobics
- biform
- square up
- aspergilliform
- square foot
- try square
- rotation
- translation
- pizza table
- reflection symmetry
- perimeter
- square yard
- area
- axis of symmetry
- bisection
- heart shape
- cigar box
- isosceles trapezia
- six side
- amorphous shape
- square metre
- t shape
- figure eight
- cyclic polygon
- steel square
- shadow box
- box up
- corner angle
- ball field
- box glove
- equilateral triangle
- comparability
- triangular prism
- isosceles triangle
- plumb bob
- satin stitch
- greaseproof paper
- embroidery hoop
- cumulus cloud
- pancake turner
- darning needle
- gothic arch
- equiangular polygon
- box ring
- angular shape
- apple box
- penalty area
- spatial property
- post office box
- in loft
- poor box
- batter's box
- store object
- po box
- three dimensional
- ringside seat
- take shape
- ballot box
- single curve
- town square
- pack case
- box in
- edge protector
- pair of shoe
- box tree
- below belt
- pack material
- symmetry orbit
- in form
- pandora's box
- reflectional symmetry
- butterfly
- rotational symmetry
- tessellation
- wire
- brickwork
- dual polygon
- similarity
- degrees of freedom
- rectilinear polygon
- polyomino
- three-dimensional
- commensurability
- polyabolo
- japanese theorem for cyclic quadrilaterals
- isoperimetric theorem
- inscribed figure
- british flag theorem
- bow tie
- homothetic transformation
- great circle
- reflex angle
- polygon density
- interior angle
- space frame
- right triangle

That's about all the rectangle related words we've got! I hope this list of rectangle terms was useful to you in some way or another. The words down here at the bottom of the list will be in some way associated with rectangle, but perhaps tenuously (if you've currenly got it sorted by relevance, that is). If you have any feedback for the site, please post it here, but please note this is only a hobby project, so I may not be able to make regular updates to the site. Have a nice day! 🐬