How to query Wikidata items using its labels?

Question

How can I query Wikidata to get all items that have labels contain a word? I tried this but didn't work; it retrieved nothing.

SELECT ?item ?itemLabel WHERE {
  SERVICE wikibase:label {
    bd:serviceParam wikibase:language "en".
    ?item rdfs:label ?itemLabel.  
  }
FILTER(CONTAINS(LCASE(?itemLabel), "keyword"))
}
LIMIT 1000

Answer 1

Following your question and the useful comments provided, I ended up with this query

SELECT ?item ?itemLabel
WHERE { 
  ?item rdfs:label ?itemLabel. 
  FILTER(CONTAINS(LCASE(?itemLabel), "city"@en)). 
} limit 10

For which I got those results

item          itemLabel
wd:Q515       city
wd:Q7930989   city
wd:Q15253706  city
wd:Q532039    The Eternal City
wd:Q1969820   The Eternal City
wd:Q3986838   The Eternal City
wd:Q7732543   The Eternal City
wd:Q7737016   The Golden City
wd:Q5119      capital city
wd:Q1555      Guatemala City

try it here

Answer 2

Yes, you can search by label, for example:

SELECT distinct ?item ?itemLabel ?itemDescription WHERE{  
  ?item ?label "Something"@en.  
  ?article schema:about ?item .
  ?article schema:inLanguage "en" .
  ?article schema:isPartOf <https://en.wikipedia.org/>. 
  SERVICE wikibase:label { bd:serviceParam wikibase:language "en". }    
}

see it on Query page.