产品会在“主题”或“标题”检索词中自动查找不同拼写形式（如美式与英式拼写差异）。该功能可以让产品在检索结果中包含具有相同含义的不同单词。如果您输入美式检索词，产品将自动检索相对应的英式检索词。检索词并输入英式检索词，则也会检索美式拼写。例如：
如果要关闭此功能，请使用引号将检索词引起。例如，"color" 只会找到包含检索词 color 的记录。检索结果中不会返回包含单词 colour 的论文。
同义词不能与通配符 (* $ ?) 结合使用。例如，输入美式拼写检索词 Pediatric* 将不会查找包含英式相等检索词 Paediatric 或 Paediatrics 的记录；它将仅返回包含 Pediatric 和 Pediatrics 的记录。
| 美国 | UK | 美国 | UK | 美国 | UK | 美国 | UK |
|---|---|---|---|---|---|---|---|
| airplanes | aeroplanes |
desensitizers |
desensitisers |
immunizing |
immunising |
oxidizing |
oxidising |
| aluminum | aluminium |
destacking |
unstacking |
ionization |
ionisation |
ozonizing |
ozonising |
| analyzed | analysed |
desulfurizing |
desulphurising |
ionized |
ionised |
pajamas |
pyjamas |
| analyzers | analysers |
diarrhea |
diarrhoea |
isomerizing |
isomerising |
paleontology |
palaeontology |
| analyzing | analysing |
dikes |
dykes |
jails |
gaols |
pantyhose |
panti-hose |
| anemia |
anaemia |
downspouts |
downpipes |
jewelry |
jewellery |
paper currency |
papercurrency |
|
anesthesia |
anaesthesia |
economizers |
economisers |
joy stick |
joystick |
parlor |
parlour |
|
anesthetics |
anaesthetics |
encyclopedias |
encyclopaedias |
katathermometers |
catathermometers |
pasteurizing |
pasteurising |
|
anesthetizing |
anaesthetising |
endeavor |
endeavour |
kit bags |
kitbags |
pediatric |
paediatric |
|
anodizing |
anodising |
equalizing |
equalising |
knuckle-dusters |
knuckledusters |
phanastrons |
phantastrons |
|
archeology |
archaeology |
esophageal |
oesophagal |
labor |
labour |
phase changing |
phasechanging |
|
armor |
armour |
esophagoscopes |
oesophagoscopes |
land mine |
landmine |
plowing |
ploughing |
|
armored |
armoured |
esophagus |
oesophagus |
leukemia |
leukaemia |
polarization |
polarisation |
|
armoring |
armouring |
estrogen |
oestrogen |
limbing |
delimbing |
polarized |
polarised |
|
astronautic |
cosmonautic |
estrogens |
oestrogens |
liter |
litre |
polyethylene |
polyethene |
|
astronautics |
cosmonautics |
fertilization |
fertilisation |
localizing |
localising |
polymerizable |
polymerisable |
|
atomizers |
atomisers |
fertilizing |
fertilising |
lumber jackets |
lumberjackets |
polymerized |
polymerised |
|
atomizing |
atomising |
fetus |
foetus |
lustering |
lustring |
practicing |
practising |
|
behavior |
behaviour |
fiberglass |
fibreglass |
lusters |
lustres |
pretense |
pretence |
|
calibers |
calibres |
fibers |
fibres |
macadamized |
macadamised |
program |
programme |
|
calipers |
callipers |
flavoring |
flavouring |
machetes |
machets |
pruning shears |
secateurs |
|
carbonization |
carbonisation |
fluidized |
fluidised |
magnetization |
magnetisation |
pulverizing |
pulverising |
|
carburetors |
carburettors |
fluidizing |
fluidising |
magnetizing |
magnetising |
recognizing |
recognising |
|
carburizing |
carburising |
fold lines |
foldlines |
magneto therapy |
magnetotherapy |
selvage |
selvedges |
|
carcasses |
carcases |
galoshes |
goloshes |
malleableizing |
malleabilising |
sensitizing |
sensitising |
|
cauterization |
cauterisation |
galvanizing |
galvanising |
maneuver |
manoeuvre |
septicemia |
septicaemia |
|
cauterizing |
cauterising |
gasoline |
petrol |
maneuvering |
manoeuvring |
stabilizers |
stabilisers |
|
celiac disease |
coeliac disease |
gear cutting |
gearcutting |
mercerizing |
mercerising |
sterilization |
sterilisation |
|
center |
centre |
graphitizing |
graphitising |
metacenters |
metacentres |
streetcars |
tramways |
|
centering |
centring |
groins |
groynes |
metalizing |
metallising |
subsidizing |
subsidising |
|
centers |
centres |
gynecology |
gynaecology |
mineralization |
mineralisation |
sulfate |
sulphate |
|
cesium |
caesium |
hand tools |
handtools |
minimizing |
minimising |
sulfates |
sulphates |
|
co-morbidity |
comorbidity |
harbor |
harbour |
molded |
moulded |
sulfites |
sulphites |
|
color |
colour |
hemangioma |
haemangioma |
molding |
moulding |
sulfur |
sulphur |
|
colored |
coloured |
hematein |
haematein |
molds |
moulds |
synchronization |
synchronisation |
|
coloring |
colouring |
hematoma |
haematoma |
mollusks |
molluscs |
synthesizing |
systhesising |
|
colters |
coulters |
hemoglobin |
haemoglobin |
mucus |
mucous |
tableting |
tabletting |
|
cozies |
cosies |
hemophilia |
haemophilia |
multicolor |
multicolour |
thalassemia |
thalassaemia |
|
cross-linking |
crosslinking |
hemorrhage |
haemorrhage |
nebulizers |
nebulisers |
theater |
theatre |
|
crystallizing |
crystallising |
hemorrhoids |
haemorrhoids |
neighbor |
neighbour |
thrombocytopenia |
thrombocytopaenia |
|
curb |
kerb |
homeopathy |
homoeopathy |
neutralization |
neutralisation |
tire |
tyre |
|
cyclization |
cyclisation |
homogenizing |
homogenising |
neutralizing |
neutralising |
tracklayers |
platelayers |
|
decarburizing |
decarburising |
honor |
honour |
nevus |
naevus |
tumor |
tumour |
|
decolorizing |
decolourising |
humor |
humour |
occurring |
occuring |
unauthorized |
unauthorised |
|
demagnetizing |
demagnetising |
hydrocele |
hydrocoele |
odor |
odour |
vapor |
vapour |
|
deodorizing |
deodorising |
hyperglycemia |
hyperglycaemia |
optimization |
optimisation |
vaporizers |
vaporisers |
|
depolarizing |
depolarising |
hypoglycemia |
hypoglycaemia |
orthopedics |
orthopaedics |
windshields |
windscreens |
|
depolymerizing |
depolymerising |
immobilized |
immobilised |
oxacillins |
oxapenicillins |