orI. , or else , make haste or else you will be late ,   , or so , -   II.    
orach
oracle, , 
oracular,   , 
oral, , 
orally,   , not to be taken orally 
orange, blood orange -,  
Orange , Orange lodge   {. Orangeman}
orange melon 
orangeade
orangeblossom , 
orangefin 
orangelily 
Orangeman
orangepeel ,  
orangery   , 
orangetip-
orangoutang
orangutan
orate , , 
oration, direct oration  
orator, he is no orator   , Public O.   
oratorical, 
oratorio
oratoryI. ,  , ,  II. , 
orb, ,  
orbed orb, , 
orbicular, , 
orbit, to put in orbit   , to go into orbit   
orbital, orbital station  , orbital transfer      
orbiting  ,   , 
Orcadian, ,   
orchard 
orcharding
orchardman
orchestic
orchestics 
orchestra,     , 
orchestral
orchestrate, 
orchestration, 
orchestrion
orchid
orchidaceous
orchil
orchis
ordain   , , 
ordeal , " "
order, , order of priorities 
orderbook ,    
orderform ,  
orderliness, ,  
orderly, , 
orderlyroom 
orderpaper 
ordinal,  
ordinance, ,  
ordinarily, ,  
ordinary, , 
ordination   , 
ordnance , ,   
ordure, , 
ore, , 
ore body 
oread
oredressing ,    
organ, organs of speech  , 
organblower 
organdie , 
organdy , 
organgrinder
organic,    , 
organism
organist
organization, , 
organization chart
organize, ,   
organized organize, , organized labour  
organizer
organloft    , 
organotherapy
organplayer= organist
orgasm
orgeat
orgy, , 
oriel, ,  
orient,  ,   
oriental, ,  
orientalism, , 
orientalist, 
orientalize      
orientate= orient
orientation, , 
oriented orient,       -.,  -.
orifice, , 
origan 
origanum 
origin, , 
original, , in the original  
originality, , 
originally,  , 
originate , , 
origination, , 
originative , , 
originator, , 
orinasal-, orinasal vowel  
oriole
Orion 
orison
orlop , 
orlopdeck= orlop
ormolu ,     ,  
ornament, , he is an ornament to his profession     
ornamental , , 
ornamentation, 
ornate , 
ornithic= ornithological
ornithological
ornithologist
ornithology
ornithorhyncus
orogenesis= orogeny
orogeny, 
orography
oroide    
orotund, , 
orphan, ,  
orphanage,   
orphaned orphan, ,  
orphanhood
Orphean,   , 
Orpheus
Orphic, , 
orpin 
orpine 
Orpington
orrery
orris ,  ,    
orrispowder= orris
orrisroot= orris
orthodox, , 
orthodoxy, 
orthoepy
orthogenesis
orthogonal, 
orthographic
orthographical
orthography, 
orthopaedic
orthopaedist
orthopaedy
orthopedic
orthopedist
orthopedy
orthoptic   
ortolan 
oryx , 
