Difference between Corroborate and Underpin

CORROBORATE vs UNDERPIN: ADJECTIVE

Establish or strengthen as with new evidence or facts
Give evidence for
Support with evidence or authority or make more certain or confirm
To confirm, strengthen or support something with additional evidence; to attest or vouch.

To support by some solid foundation; to place something underneath for support.
To lay stones, masonry, etc., under, as the sills of a building, on which it is to rest.
To give support or substance to.
To support from below, as with props, girders, or masonry.

Corroborated; strengthened; confirmed.
To strengthen; make strong, or impart additional strength to: as, to corroborate the judgment, will, or habits.
To confirm; make more certain; give additional assurance of: as, the news is corroborated by recent advices.

To pin or support underneath; place something under for support or foundation when a previous support is removed; underset; hence, figuratively, to support; prop.

Echo, Consistent, Attest, Reinforce, Testify, Ascertain, Verify, Bear out, Support, Underpin, Sustain, Affirm, Validate, Confirm, Substantiate

Solidify, Buttress, Enhance, Entrench, Stimulate, Underline, Boost, Bolster, Sustain, Strengthen, Underlie, Reinforce, Bear out, Corroborate, Support

Check, Endorse, Echo, Consistent, Attest, Reinforce, Testify, Ascertain, Verify, Support, Underpin, Affirm, Validate, Confirm, Substantiate

Promote, Complement, Underlies, Buttress, Enhance, Entrench, Stimulate, Underline, Boost, Bolster, Strengthen, Underlie, Reinforce, Corroborate, Support

Relevant literature was used to corroborate the findings.
No third parties are contacted to corroborate records.
No other newspaper records corroborate this story, however.
Randomised studies are needed to corroborate these results.
To validate, authorize, certify, confirm, countersign, corroborate, ratify.
More trials are underway to corroborate these results.
Character letters should corroborate your experiences in AMCAS.
Obtain independent written documentation to corroborate oral statements.
Human Rights Watch could not corroborate his statement.
Benitez set out to corroborate, and did corroborate, important details in the information.