1. For the most part
   - principally, primarily, mainly, in the main, majorly

See also: chief

• Regius professor
• Reglaecus
• reglet
• regnal
• regnant
• regnellidium
• Regnellidium diphyllum
• rego
• regorge
• regosol
• regrade
• regress
• regression
• regression analysis
• regression coefficient
• regression curve
• regression equation
• regression line
• regression of y on x
• regression toward the mean
• regressive
• regret
• regretful
• regretfully
• regrets