1) At a high rate or wage 2) Eminently 3) Extremely 4) Highly seasoned food 5) Importantly 6) In an exalted manner 7) In or to a high degree 8) More than adequately 9) Much 10) Notably 11) Outstandingly 12) Significantly 13) To a great degree 14) To a high degree or extent 15) Very 16) Way to be exalted or regarded Found on https://www.crosswordclues.com/clue/highly
in or to a high degree; extremely: highly amusing; highly seasoned food. · with high appreciation or praise; admiringly: to speak highly of a person. · more than adequately; generously: a highly paid consultant. Found on https://www.infoplease.com/dictionary/highly