Synonyms of the word 
HONESTLY → ABOVEBOARD - CANDIDLY - FRANKLY
honestly
- adv. (manner) In an honest manner.
- adv. (speech act) Frankly.
- interj. Used to express exasperation, dismay, etc.
aboveboard
- adj. Alternative form of above-board.
candidly
- adv. in a candid manner; frankly.
frankly
- adv. (manner) In a frank, open or (too) honest manner.
- adv. (speech act) In truth, to tell the truth.
If you are interested in words, visit the following sites :
- wiktionary.org/honestly For complete definition of a word
- 1word.ws/honestly to play with words, suffixs, prefixs, etc.