field, sphere (of work), area (of study) / the area of one person's focus of work or study

(arithmetic) fraction

(set theory) element / (arithmetic) numerator / (chemistry) molecule

(grammar) past participle

(grammar) a sentence / writing / an essay or composition / a writing style

boss; father figure / a foster parent, a temporary adoptive parent

doctoral thesis; dissertation

(mathematics) integration

liberal arts, humanities, social sciences, and fine arts

the vernal equinox / the day of the vernal equinox