1) Certainly 2) Forsooth 3) In sooth 4) In truth 5) Indeed 6) Indeed, scriptures-style 7) Life sciences industry 8) Old-style agreement 9) Transhumanist organization 10) Yea follower 1) Indeed 2) Verrayment 3) Yea 
truly; certainly; confidently
• (adv.) In very truth; beyond doubt or question; in fact; certainly.
Ver'i·ly adverb [ From Very .] In very truth; beyond doubt or question; in fact; certainly. Bacon. « Trust in the Lord and do good; so shalt thou dwell in the land, and verily thou shalt be fed.» Ps. xxxvii. 3. 
[adv] - (archaic) truly or confidentially 2. [adv] - in truth
verily In truth (archaic).
adverb in truth; beyond doubt or question; `trust in the Lord...and verily thou shalt be fed`- Ps 37:3