roentgenoluminescence
luminescence produced by exposition to the X-rays.

roentgenometry
The measurement of radiation with a roentgenometer.

roentgenoscopy
Synonym of fluoroscopy.

roentgenotherapy
The therapeutic use of X-rays.

roentgens
plural of roentgen

roentgentherapy
Alternative form of roentgenotherapy.

roex
A kind of signal filter used in modelling the auditory system.

rogation
A deeply serious and somber prayer or entreaty.
The demand, by the consuls or tribunes, of a law to be passed by the people; a proposed law or decree.

rogations
plural of rogation

rogitation
The act or process of rogitating.
Something which is rogitated.

rogitations
plural of rogitation

roguedom
roguery

roguehood
roguery

rogueling
A little or petty rogue.

roguelings
plural of rogueling

rogueries
plural of roguery

roguery
malicious or reckless behaviour
mischievous behaviour

rogueship
The quality or state of being a rogue.

roguishness
The property of being or appearing roguish.

roguishnesses
plural of roguishness

roisterousness
The state of being roisterous.

rolelessness
Absence of a role.

roleo
Alternative form of rolleo.

roleos
plural of roleo

roleplay
To act out a scenario or fantasy with another person or other people.
To act as a character as part of a fantasy, especially with a group.
To act out a social role, especially one that one does not truly belong to.

roleplayed
simple past and past participle of roleplay

roleplays
plural of roleplay

rollability
The quality of being rollable.

rollbacker
Someone or something which rolls back, or returns things to prior states.

rollbackers
plural of rollbacker

rolleos
plural of rolleo

rollerball
A kind of ballpoint pen with a spherical nib that uses water-based liquid or gelled ink.
A trackball.

rollerballs
plural of rollerball

rollermaking
The manufacture of rollers.

rollerski
A form of ski fitted with rollers (small wheels) at each end

rollerskis
plural of rollerski

rollickingness
The quality of being rollicking.

rollicksomeness
The quality of being rollicksome.

rollographies
plural of rollography

rollography
A selective list of piano roll titles that share a similar characteristic such as the same genre, the same composer, the same artist, etc.

rollout
An act of rolling out; gradual deployment.
The phase of a landing after touchdown but before the aircraft slows to taxi speed.
A play in which a quarterback moves toward the sideline before attempting to pass.
A form of analysis in which the same position is played many times (with different dice rolls) and the various outcomes are recorded.
A game variant in which players progressively reveal their cards.
A malfunction in a gas furnace where gas burns outside the combustion chamber. Such a malfunction can cause damage to the furnace, carbon monoxide poisoning, or start a fire.

rollouts
plural of rollout

rollover
The process of incrementing, especially back to an initial value.
A road traffic accident in which a vehicle overturns.
A graphic element that changes its appearance when the cursor moves over it.
A keyboard feature where each key is scanned independently, so that multiple simultaneous keypresses always register correctly.
The sudden ignition of flammable gases (produced by pyrolysis in an oxygen-poor environment) near the ceiling of a room or other enclosed space.
The reinvestment of funds in a new issue of the same or similar investment.
A fee paid by a borrower in order to defer full repayment of a loan.
In the National or European lottery, the situation in which a jackpot that has not been won is carried over to the next week.
A target on the pinball table that is activated when the ball rolls over it.

rollovers
plural of rollover

rollslop
Soulslike video games, especially ones that overly rely on the prototypical roll-to-dodge mechanic of that genre.

romaction
Action romance.

romanette
A Roman numeral in lower case, such as “ii”, as frequently introduces list items; or, a list item introduced by such.

romanettes
plural of romanette

romanisation
Alternative letter-case form of Romanisation: non-Oxford British English standard spelling of Romanization.

romanisations
plural of romanisation

romanization
Alternative letter-case form of Romanization.

romanizations
plural of romanization

romantasy
Romantic fantasy, a subgenre of fantasy literature.
A romantic fantasy.

romanticalness
Quality of being romantical.

romanticisation
Non-Oxford British English standard spelling of romanticization.

romanticisations
plural of romanticisation

romanticism
A romantic quality, spirit or action.

romanticisms
plural of romanticism

romanticity
The state or condition when romantic feelings are felt or conveyed.

romanticization
The act or process of romanticizing.
The result of such a process; a romantic treatment.

romanticizations
plural of romanticization

romanticness
The state or quality of being romantic.

romantism
Alternative form of romanticism.

romantopia
A fantasy world which serves as an ideal setting for romance as typically imagined by women.

romantopias
plural of romantopia

rompishness
The quality of being rompish.

ronde
A kind of script in which the tails of the letters are curly, giving the characters a rounded look.

rondino
Synonym of rondoletto.

rondinos
plural of rondino

rondocubism
A form of cubism, in post-World War One Czechoslovakia, that employed more rounded forms

rondoletti
plural of rondoletto

rondoletto
A simple rondo.

rondolettos
plural of rondoletto

rondure
A graceful curvature or round object; a ring; a sphere.
The quality of being round; roundness.

rondures
plural of rondure

roneat
Any of several types of xylophone used in traditional Cambodian music.

roneats
plural of roneat

ronnaparsec
An astronomical unit of distance equal to 10²⁷ parsecs.

ronnaparsecs
plural of ronnaparsec

roodloft
Alternative spelling of rood-loft.

roofbeam
Any of the beams that form a roof.

roofbeams
plural of roofbeam

rooflessness
The state of being roofless.
The state of being roofless.

rooflet
A small roof or covering.

rooflets
plural of rooflet

rooftopping
A form of urban exploration by accessing a rooftop to acquire skyline photography, often done illegally with the risk of personal injury.

rooftree
The primary beam of a roof; the ridgepole; hence, the roof itself.
A home; a household.

rooftrees
plural of rooftree

roofwork
Construction work done on a roof.

rooineck
Alternative form of rooinek.

rooinecks
plural of rooineck

rookus
Alternative form of ruckus.

rookuses
plural of rookus

roomba
A robotic vacuum cleaner.

roombas
plural of roomba

roominess
The quality of being roomy

roomlessness
Absence of room or rooms.

roommatehood
The state of being a roommate.

roommateness
The state of individuals being or acting like roommates.

roomset
A model or part of a showroom etc. furnished to look like a room in a house.
A collection of matching materials for decorating a room, including wallpaper, friezes, dadoes, etc.

roomsets
plural of roomset

roorbach
A defamatory forgery or falsehood published for purposes of political intrigue.

roorback
Alternative form of roorbach.

roosterhood
The state or period of being a rooster.

roosterness
The quality of being a rooster, or having characteristics typical of a rooster; cockiness.

roostership
A term of address for a rooster.

rootage
The process of forming roots.
Roots collectively.

rootages
plural of rootage

rootedness
The state or quality of being rooted

rootfastness
The quality of being rootfast.

rootfinder
An algorithm for finding roots of an equation.

rootfinders
plural of rootfinder

rootfinding
The process of finding the root of an equation.

rootiness
The quality of being rooty.

rootlessness
The property of being rootless.

rootlessnesses
plural of rootlessness

rootlet
One of the smallest roots, hair roots.

rootlets
plural of rootlet

rootsiness
The quality of being rootsy.

ropefuel
That which provokes suicidal ideation.