- circle
- ellipse
- geometry
- rectangle
- rows
- alcove
- semicircular
- geometric shape
- arc
- hemicycle
- dais
- cylindrical
- banquette
- perpendicular
- anteroom
- diagonal
- parallelogram
- diameter
- moonlike
- octagons
- flanking
- rectangular
- mathematics
- arrayed
- locus
- rectangles
- curving
- diagonally
- circularly
- circular
- circlet
- circumcircle
- encircle
- annular
- roundness
- uncircled
- cycloidal
- epicycle
- domed
- radians
- round
- circler
- roundly
- roundish
- rotund
- ellipsoid
- around
- circlelike
- orbicular
- pineal
- roundure
- hyperbola
- roundabout
- bulbous
- circularity
- armillary
- squircle
- oval
- roundrect
- circumradius
- inradius
- geometric
- parabolic
- obround
- tondo
- disc
- circumambulate
- roundel
- rundle
- terete
- parabola
- semirounded
- paraboloidal
- ringlike
- cycloid
- afro
- hyperboloidal
- roundedness
- encirclet
- midround
- unround
- discoid
- disciform
- allantoid
- umbrellalike
- symmetrically
- circumnavigate
- nonround
- verandah
- circularize
- maxicircle
- coalescing
- rung
- trapezoidal
- carpeted
- concentric
- circinate
- aspheric
- demicircle
- nutlike
- olivelike
- orb
- cyclo
- plumlike
- bulblike
- antechamber
- rotundifolious
- pivots
- colonnaded
- vestibule
- pivoting
- nested
- enclosing
- toroidal
- horizontally
- interstices
- sunlit
- capitate
- bounding
- diagonals
- annulus
- prisms
- epicycloid
- triquetra
- counterclockwise
- elliptical
- auriform
- veranda
- circumference
- globiferous
- alcoves
- symmetrical
- elongated
- trapezoid
- semicircles
- hexagonal
- hypocycloid
- ridges
- cincture
- triangle
- clump
- flagstone
- spandrels
- radially
- half-circle
- radian
- meander
- fluid-filled
- uprights
- squares
- axial
- tympanum
- nostril
- hillocks
- clumps
- stools
- semi-circle
- hemispherical
- umgang
- gyro
- archway
- circlip
- subacute
- disk
- postround
- radiused
- globy
- toroid
- superellipse
- courtyard
- inexact
- loop
- horseshoe-shaped
- geometrical
- torus
- 360 degree
- tacnode
- orthoradial
- plane figure
- quadrangle
- round shape
- two-dimensional figure
- barcode
- spherograph
- crescent
- hallway
- corral
- convex
- cross-section
- miscalculation
- trochoid
- sphery
- square-shaped
- spheroid
- ronde
- lectern
- radius
- u-shaped
- circumambulation
- octant
- semi-circular
- crouch
- triangle-shaped
- tsorona
- vertex
- globular
- three-quarter
- ramekin
- circular arc
- conic section
- crescent-shaped
- doorway
- bisectors
- u-shape
- semiannular
- concentrically
- dartboard
- spheroconic
- equal-sized
- triangular-shaped
- circline
- beside
- pear shape
- 10-deep
- encircling
- wedge-shaped
- ballow
- mounded
- fan-shaped
- ring-shaped
- 4,356
- threadlike
- spherical
- clypeate
- 10-by-10-foot
- circumscribing
- sphericity
- snaked
- snaking
- dome-like
- water-filled
- midocean
- orbiform
- dining-room
- arcograph
- t-shaped
- prolate
- rundel
- antiprism
- windrows
- batlike
- cone-shaped
- walkway
- arachnoid
- throng
- roundeye
- glomerous
- fogbow
- round angle
- round down
- stottie
- crenature
- buxom
- bullnose
- zerogon
- roundarm
- entryway
- outerplanar
- go round
- reflection symmetry
- central angle
- pyrte
- front
- kneels
- roundsman
- roundheaded
- perrl
- round vowel
- steradian
- cuebid
- headstamp
- unison
- chamfer
- rod shape
- subtend
- conglobate
- rounce
- atrium
- courb
- corner
- stare
- holmos
- radical plane
- easels
- mihrab
- colonnade
- peristyle
- proscenium
- knoll
- apse
- crescents
- prow
- narthex
- polyhedron
- arches
- huddle
- pew
- hug
- gazes
- cruciform
- cluster
- plaza
- binnacle
- parterre
- barricade
- pilasters
- transepts
- quarterdeck
- palisade
- expanse
- horseshoe
- torii
- amphitheater
- wall
- rhombus
- campanile
- deck
- hexagon
- tumulus
- clapping
- enfolding
- kiva
- circus ring
- tetrahedron
- spherical angle
- pair of compass
- rotate mechanism
- granny square
- some room
- thales' theorem
- traffic circle
- figure eight
- entranceway
- egg shape
- close curve
- round trip
- gaggle
- round off
- some table
- major axis
- downstage
- break wheel
- canebrake
- phalanxes
- chessboards
- skylit
- posterboard
- lecturn
- checkerboards
- hunkers
- breezeway
- crenellations
- caryatids
- flowerlike
- geometric figure
- featherlike
- bow compass
- inscribed figure
- round out
- planet earth
- star polygon
- ball shape
- look round
- twiddle one's thumb
- spherical geometry
- make hand
- round up
- pope joan
- quadrature
- round shoot
- right triangle
- ballet flat
- polygon
- area
- plane
- right angle
- equilateral triangle
- concurrent lines
- isosceles triangle
- prayer rug
- flower petal
- cumulus cloud
- chainlink fence
- lily pad
- bas relief
- triangular prism
- newel post
- arbor vitae
- arbelos
- chaises longues
- conga line
- compass and straightedge constructions
- geometric mean
- arithmetic mean
- straight line
- pythagorean theorem
- knelt
- neat rows
- crouched
- cross legged
- grassy
- kneeling
- kneeled
- motioned
- folding chairs
- crouching
- l shaped
- makeshift memorial
- gesturing
- makeshift
- seated
- hands clasped
- motioning
- huddled
- swiveled
- oblong
- somberly
- arms outstretched
- cupped
- arms folded
- angled
- outstretched arms
- silently
- sat silently
- congregated
- circled
- plopped
- arched
- menacingly
- stood silently
- u shaped
- diagonally across
- nervously
- glared
- clasping
- perched
- stared
- encircled
- choir sang
- gestured
- clustered
- shyly
- draped
- phalanx
- ambled
- outstretched
- gathered
- jutting
- undulating
- clasped
- glistening
- hushed tones
- lit candles
- hugged
- glass walled
- picnic table
- gazed
- processional
- majestically
- sat
- splayed
- awkwardly

That's about all the semicircle related words we've got! I hope this list of semicircle 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 semicircle, 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! 🐠