堅魚[katsuo] skipjack tuna
堅い[katai] hard
堅果[kenka] nut
堅苦しい[katakurushii] formal
堅固[kengo] solid

堅持[kenji] holding on to
堅城[kenjou] strong fortress
堅陣[kenjin] stronghold
堅調[kenchou] bullish
堅忍[kennin] perseverance

御好み焼[okonomiyaki] savoury pancake with various ingredients
軽目焼[karumeyaki] hard caramelized sugar candy
延焼[enshou] spread of fire
塩焼[shioyaki] (fish) grilled or broiled with salt
傍焼き[okayaki] jealousy

かば焼[kabayaki] loach or eel dipped and broiled in soy-based sauce
丸焼き[maruyaki] whole roast (e.g. pig, turkey, etc.)
丸焼け[maruyake] total fire loss
胸焼け[muneyake] heartburn
串焼[kushiyaki] grilling on a skewer