cluster vs lump

cluster

verb
  • To form a cluster or group. 

  • To cover with clusters. 

  • To collect into clusters. 

noun
  • A sequence of two or more words that occur in language with high frequency but are not idiomatic; a chunk, bundle, or lexical bundle. 

  • A small metal design that indicates that a medal has been awarded to the same person before. 

  • A set of bombs or mines released as part of the same blast. 

  • A logical data storage unit containing one or more physical sectors (see block). 

  • An ensemble of bound atoms or molecules, intermediate in size between a molecule and a bulk solid. 

  • A group of computers that work together. 

  • A group or bunch of several discrete items that are close to each other. 

  • A number of individuals grouped together or collected in one place; a crowd; a mob. 

  • A clusterfuck. 

  • A subset of a population whose members are sufficiently similar to each other and distinct from others as to be considered a distinct group; such a grouping in a set of observed data that is statistically significant. 

  • A group of consonants. 

  • A group of galaxies or stars that appear near each other. 

  • A secundal chord of three or more notes. 

lump

verb
  • To treat as a single unit; to group together in a casual or chaotic manner (as if forming an ill-defined lump of the items). 

  • To bear (a heavy or awkward burden); to carry (something unwieldy) from one place to another. 

  • To hit or strike (a person). 

  • To burden (someone) with an undesired task or responsibility. 

  • To form a lump or lumps. 

noun
  • A swelling or nodule of tissue under the skin or in an internal part of the body. 

  • A small, shaped mass of sugar, typically about a teaspoonful. 

  • A dull or lazy person. 

  • A beating or verbal abuse. 

  • A group, set, or unit. 

  • A projection beneath the breech end of a gun barrel. 

  • A kind of fish, the lumpsucker. 

  • Something that protrudes, sticks out, or sticks together; a cluster or blob; a mound or mass of no particular shape. 

How often have the words cluster and lump occurred in a corpus of books? (source: Google Ngram Viewer )