Synonyms for Highly:

adv

extremely (adverb)
very, profoundly, deeply, immensely.
highly (adverb)
Atmospherically, loftily.
sizably (adverb)
extensively, magnificently, broadly, dimensionally, largely, expansively, sizably, chunkily, voluminously, widely, Corpulently, greatly.
sufficiently (adverb)
well.

adv.

eminently (adverb)
very.
extremely (adverb)
very, extremely.
greatly (adverb)
most, indeed, largely.
highly (adverb)
eminently, Atmospherically, extremely, awful, immensely, exceptionally, loftily, profoundly, greatly, awfully, notably, mighty, deeply, really.
notably (adverb)
particularly.
right (adverb)
well.
sizably (adverb)
extensively, magnificently, broadly, dimensionally, largely, expansively, sizably, chunkily, voluminously, widely, Corpulently, greatly.
terribly (adverb)
thoroughly, dreadfully.

n.

you ought to see/hear/meet etc., not/never in your (wildest) dreams, beyond/without compare, cool, there's nothing/no place like something, there's no comparison, to a fault, monumental, than someone/something put together. most, well, very, awfully, awful, exceptionally, indeed, mighty, thoroughly, immensely, really, notably, particularly, eminently, big, dreadfully, extra, a lot. highly (noun)
extremely.

Other synonyms:

eminently, dreadfully. notably. exceptionally, awfully. extra. mighty. cool. Other relevant words:
particularly, awful, awfully, deeply, extremely, eminently, mighty, dreadfully, notably, extra, big, most, profoundly, exceptionally, well, thoroughly, indeed, cool, immensely, really, very, monumental.

Usage examples for highly

  1. I am so sorry to cause you any disappointment, and I appreciate most highly the honour which you do me, but what you ask is quite impossible." – Round the Red Lamp Being Facts and Fancies of Medical Life by Arthur Conan Doyle
  2. A person very highly placed has expressed his complete belief in you. – Princess Maritza by Percy Brebner
  3. I give you my word that I respect your studies most highly – Royal Highness by Thomas Mann