say it: AHYS-burg
iceberg is a noun meaning "a large mass of ice floating at sea; usually broken off of a polar glacier". It carries 2 recorded senses.
lettuce with crisp tightly packed light-green leaves in a firm head
“iceberg is still the most popular lettuce”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for iceberg come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.