Words starting with R, then O, then S, ending in S
351 words fit this spine. The 240 most recognizable are listed below, longest and commonest first. They start with R, end with S, and contain O then S in that order in between — not necessarily side by side.
- rabbi doesn't fit: it starts with R but ends with I, not S.
- rabbits doesn't fit: it has the right ends but no O in the middle.
- reasons doesn't fit: it has every letter of ROSS but they don't appear in order inside it.
5-letter words
roses
6-letter words
roasts
7-letter words
recross, regloss, reposes, riboses, riposts
8-letter words
regosols, rehouses, remorses, reposals, reposers, reposits, ringtoss, ripostes, roadless, roosters, rosebuds
9-letter words
rearouses, rechooses, recourses, recrosses, redhorses, reexposes, refocuses, reforests, reglosses, reimposes, reopposes, repossess, repousses, reprocess, reredoses, responses, rhamnoses, rheobases, rheostats, rhombuses, ribosomes, rigorisms, rigorists, roadshows, roadsides
10-letter words
racehorses, radiolyses, radiolysis, raffinoses, ramosities, randomness, rearousals, reasonless, recognises, recoilless, recomposes, recordists, redeposits, redisposes, refocusses, reformisms, reformists, remoistens, remoteness, reobserves, reoviruses, repolishes, retrogress, rhizopuses, rhodopsins, rimosities, ringtosses, roadhouses, roadsteads
11-letter words
racecourses, radiosondes, raucousness, reafforests, recompenses, recondenses, reconquests, reconsiders, rectorships, reexposures, remorseless, repositions, repossesses, reprocesses, responsions, retrospects, reunionists, rhapsodists, rheologists, riotousness
12-letter words
radiologists, randomnesses, rationalises, rationalisms, rationalists, rationalness, ravenousness, rebroadcasts, reconstructs, regionalisms, regionalists, religionists, religionless, remonstrants, remonstrates, remotenesses, rendezvouses, repositories, repossessors, reprovisions, resoluteness, responsories, retrogresses, retroviruses, reupholsters, revisionisms, revisionists, rhinoceroses, rhinoscopies, rhinoviruses, rhizospheres, ribbonfishes, rigorousness
13-letter words
radiationless, radiochemists, radioisotopes, rapaciousness, rapturousness, raucousnesses, receptionists, recommissions, reconditeness, reconsecrates, reconstitutes, reconversions, reductionisms, reductionists, reimpositions, relationships, religiosities, religiousness, remonstrances, remonstrators, removableness, reposefulness, repossessions, retinoscopies, retrocessions, retroversions, rhabdoviruses, rhinoplasties, ribonucleases, righteousness, riotousnesses
14-letter words
rampageousness, rationalnesses, ravenousnesses, reasonableness, rebelliousness, recompositions, reconsolidates, reconstructors, recreationists, redispositions, reforestations, refractoriness, rehospitalizes, remonstrations, remorsefulness, reorchestrates, resolutenesses, responsiveness, retrogressions, retrospections, retrospectives, revolutionises, revolutionists, rhodochrosites, ridiculousness, rigorousnesses
15-letter words
radiobiologists, radiostrontiums, radiotherapists, rapaciousnesses, rapturousnesses, reactionaryisms, reconditenesses, reconnaissances, reconsecrations, reconstitutions, reconstructions, religiousnesses, remorselessness, removablenesses, repetitiousness, reposefulnesses, reproachfulness, repudiationists, reservationists, resourcefulness, responsibleness, restrictionisms, restrictionists, retinoblastomas, rheumatologists, ribonucleosides, righteousnesses
16-letter words
radiochemistries, rambunctiousness, rampageousnesses, reafforestations, reasonablenesses, rebelliousnesses, reconsiderations, refractorinesses, remorsefulnesses, reorchestrations, responsibilities, responsivenesses, resurrectionists, ridiculousnesses
17-letter words
radioimmunoassays, remorselessnesses, repetitiousnesses, reproachfulnesses, resourcefulnesses, responsiblenesses, revolutionariness, rhabdomyosarcomas
18-letter words
radiosensitivities, rambunctiousnesses, reconstructionisms, reconstructionists, redistributionists, rehospitalizations
19-letter words
revolutionarinesses
20-letter words
representationalisms, representationalists
Where this pattern came from
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How the rule works