Skip to Main Content

*Effective Health Science Searching: Keywords Synonyms

Effective Health Science Searching

Keyword Synoymns

Introduction

Not all authors use the same terms when they write. One author can refer to one concept by one word, while another uses another word. Having synonyms for your keywords will improve your results when you search the databases by not restricting yourself to one word  

Identifying synonyms

When you are searching the literature, think about differences in spellings and terminology, and incorporate alternatives into your search strategy. 

For example:

Spelling Variations

  • anaemia/anemia
  • leukaemia/leukemia
  • paediatric/pediatric

Terminology

  • ER or ED or A&E
  • operating theatre or operating room

When you are searching the literature think about differences in spellings and terminology, and incorporate alternatives into your search strategy. 

For example:

Spelling Variations

  • anaemia/anemia
  • leukaemia/leukemia
  • paediatric/pediatric

Terminology

  • ER or ED or A&E
  • operating theatre or operating room

Use subject-specific terminology or technical terms in addition to colloquial words.

Use these specialized terms in your search to improve your results. If you do not know the standard terminology, then the database subject index or thesaurus may help. 

For example: 

Natural Language Database Language
sudden OR severe acute
iron deficiency anaemia
skin epidermis
heart attack myocardial Infarction
kneecap patella
Swelling Edema
Bruise Contusion

If you are searching across long time periods, remember that terminology changes over time.   

New words appear, others change meaning so be prepared to reflect this in your search strategy. 

For example:

When researching unhoused people the following terms have been used:

  • Transients and Migrants
  • Homeless Persons
  • Ill-Housed Persons
  • Unhoused

Have acronyms or abbreviations been used in the sources you have read?  These can be included in your search terms in order to findi matching results. 

For example: 

Acronym Abbreviation
AMA Against Medical Advice
AIDS Acquired Immune Deficiency Syndrome
ADHD Attention Deficit Hyperactivity Disorder
CAT Scan Computerized Axial Tomography Scan
ECG/EKG Electrocardiogram
ER Emergency Room

When searching try using both large umbrella terms and more specific terminology

For example: 

Umbrella Term Specific Terminology

Health Personnel

Nurse, Medical Technician, Heath Care Assistant

LGBTQIA+ lesbian, gay, bisexual, and transgender, queer, intersex, asexual
Heart Diseases  Atrial Fibrillation, Bradycardia, Tachycardia, Ventricular Fibrillation
Nurse nurse practitioner, registered nurse
Sexually transmitted diseases Syphilis, gonorrhea, herpes, chlamydia, etc.
Hospital emergency room, intensive care, operating room 

How to find synonyms

Google and other search engines can be a good place to find alterative words for your key concepts. 

There are two stragies:

  • enter your key concept followed by synyomyns 
  • enter your topic and look skim read the articles you find
As you search for sources using the keywords, you will identify new keywords from abstracts, subject terms and titles. You can revise your searches with new keywords and continue the process until you find relevant sources. 

Subject Headings in CINAHL are an effect method for finding resources. However, they do have a learning curve.

More information can be found here.

Example

Research question: Among adults aged 19-44 with migraines are non-drug therapies effective at treating pain?

Take a look at the key concepts below for more explanations about alterative keywords.

 

Search terms that include names of medical conditions will rarely include alternative terms unless (see above for examples):

  • there is a colloquial term and a medical term
  • an abbreviation and a non-abbreviation

In this example, if "headaches" were added to the list of keywords, the search results would be too broad since we only want results about a specific type of headache - migraine.

While we could add other terms like "pain management" or "pain measurement" because these terms have the word pain in them they will appear in the search results with just the word "pain." We could add some terms like suffering, ache, etc., but pain is a clearly defined concept within medicine, and studies will probably use this word when discussing treating pain. 

For this term, we want to add more terms since researchers are probably going to refer to the specific treatment(s) they used rather than using the broad term "non-drug therapies" or "non-drug therapy."

To find alternative words, I did a Google search (we are using Google to find keywords, not sources). In my Google search, I came across lots of different types of therapies. 

For this concept depending on the database you are searching in it may be better to use an "age" filter (click here for more information).

However, if the database doesn't have an age filter it would probably be best to remove the age range from your keyword concept and just have the word "adult."

Take a look at the tree structure below which shows the different key concepts and then the keywords.

If you take a look at the difference in the number of search results between these two different searches, it shows you why having synonyms for you key concepts is a good idea.

Next step

Look at the connecting your keywords together or special characters page or move to the page about initial searching..


Credit Statement: The information on this page was reused and adapted (with permission) from the University of Exeter's Guide Search Techniques: Identifying search terms and South East Technological University's Guide Search Strategy: Finding Information

Material is licensed for reuse under the Creative Commons license CC BY-NC