say it: plow
plough is a noun and verb meaning "a group of seven bright stars in the constellation Ursa Major". It carries 4 recorded senses.
a group of seven bright stars in the constellation Ursa Major
a farm tool having one or more heavy blades to break the soil and cut a furrow prior to sowing
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 plough 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.