A list of synonyms used in the library catalogue. Searching the keyword will also find its synonym. This is particularly useful in cases of British and American spelling. For example, searching "theatre" will also find "theater."

Keyword Synonym
1st first
2nd second
3rd third
4th fourth
5th fifth
6th sixth
7th seventh
8th eighth
9th ninth
10th tenth
11th eleventh
12th twelfth
13th thirteenth
14th fourteenth
15th fifteenth
16th sixteenth
17th seventeenth
18th eighteenth
19th nineteenth
20th twentieth
21st twenty first
30th thirtieth
40th fortieth
50th fiftieth
60th sixtieth
70th seventieth
80th eightieth
90th ninetieth
100 hundred
1000 thousand
1000000 million
abridgement abridgment
aging ageing
airplane aeroplane
airplanes aeroplanes
ameba amoeba
archaeological archeological
archaeologist archeologist
archaeology archeology
armor armour
behavior behaviour
behaviorists behaviourists
caesarean caesarian
carbonisation carbonization
cataloging cataloguing
catalogue catalog
centers centres
centre center
civilization civilisation
color colour
complete compleat
counseling counselling
counselor counsellor
criminalisation criminalization
defense defence
dialogue dialog
diarrhea diarrhoea
encyclopedia encyclopaedia
endeavor endeavour
familiarisation familiarization
favor favour
favorite favourite
favors favours
fetus foetus
fiber fibre
flavor flavour
flavors flavours
forty fourty
globalisation globalization
gray grey
harbour harbor
honor honour
honors honours
honourable honorable
humor humour
industrialisation industrialization
industrialise industrialize
industrialised industrialized
inquiry enquiry
jail gaol
judgment judgement
labor labour
liter litre
licence license
maneuver manoeuvre
meager meagre
medieval mediaeval
meter metre
mineralization mineralisation
modeling modelling
mold mould
neighbor neighbour
neighborhood neighbourhood
neighbors neighbours
odor odour
offense offence
organization organisation
organisational organizational
organisations organizations
orthopaedic orthopedic
paleontology palaeontology
parlour parlor
pediatric paediatric
pediatrician paediatrician
pediatricians paediatricians
pharmacopoeia pharmacopea
plough plow
practise practice
pressurisation pressurization
prioritisation prioritization
privatisation privatization
program programme
programs programmes
realize realise
romania rumania
rumor rumour
savior saviour
sulpher sulfer
theatre theater
tire tyre
tires tyres
traveled travelled
traveling travelling
traveller traveler