merciful 2551 -- chemlah -- {merciful}, pity.

merciful 2603 -- chanan -- beseech, X fair, (be, find, shew) 
favour(-able), be (deal,give, grant (gracious(-ly), intreat, 
(be) {merciful}, have (shew) mercy(on, upon), have pity upon, 
pray, make supplication, X very.

merciful 2616 -- chacad -- shew self {merciful}, put to shame.

merciful 2617 -- checed -- favour, good deed(-liness, -- ness), 
kindly,(loving-)kindness, {merciful} (kindness), mercy, pity, 
reproach, wickedthing.

merciful 2623 -- chaciyd -- godly (man), good, holy (one), 
{merciful}, saint, [un-]godly.

merciful 3722 -- kaphar -- appease, make (an atonement, cleanse, 
disannul, forgive,be {merciful}, pacify, pardon, purge (away), 
put off, (make)reconcile(-liation).

merciful 7349 rachuwm -- -- full of compassion, {merciful}.

merciful 1655 ** eleemon ** {merciful}.

merciful 2433 ** hilaskomai ** be {merciful}, make 
reconciliation for.

merciful 2436 ** hileos ** be it far, {merciful}.

merciful 3629 ** oiktirmon ** {merciful}, of tender mercy.

unmerciful 0415 ** aneleemon ** {unmerciful}.