穏健[onken] quiet
頑健[ganken] robust health
強健[kyouken] robust health
健か[shitataka] determined
健やか[sukoyaka] vigorous

健胃剤[kenizai] stomach medicine
健胃錠[kenijou] stomach tablets
健気[kenage] brave
健脚[kenkyaku] good walker
健脚家[kenkyakuka] good walker

一戸建[ikkodate] detached house
一本建て[ippondate] (a) single standard
円建て[endate] denominated in yen
経営再建[keieisaiken] management reorganization
建てる[tateru] to build

建て回す[tatemawasu] to build around
建て増す[tatemasu] to extend (building)
建議[kengi] proposition
建具[tategu] fittings such as sliding doors, fusuma, shoji, etc.
建国[kenkoku] founding of a nation

鍵を掛ける[kagiwokakeru] to lock
鍵穴[kagiana] keyhole
鍵盤[kenban] keyboard (e.g. piano, computer)
黒鍵[kokken] black keys
打鍵[daken] keystroke

合鍵[aikagi] duplicate key
鍵っ子[kagikko] latchkey child
鍵束[kagitaba] bunch of keys
関鍵[kanken] locking doors

アキレス腱[akiresuken] Achilles tendon
膝蓋腱反射[shitsugaikenhansha] kneecap (patellar) reflex
腱鞘[kenshou] sheath of tendon
腱鞘炎[kenshouen] inflammation of a tendon (sheath)
アキレス腱反射[akiresukenhansha] Achilles tendon reflex

腱板[kenban] rotator cuff
腱板損傷[kenbansonshou] rotator cuff tear
回旋腱板[kaisenkenban] rotator cuff
膝蓋腱[shitsugaiken] patellar tendon