恒温器[kouonki] incubator
恒久[koukyuu] permanent
恒久化[koukyuuka] making permanent
恒常[koujou] constancy
恒心[koushin] steadiness

恒星[kousei] (fixed) star (i.e. not a planet, meteorite, etc.)
恒等式[koutoushiki] identity
恒例[kourei] established practice
恒河沙[gougasha] 10^52 (or 10^56)
恒数[kousuu] a constant (e.g. in science)

御産[osan] (giving) birth
御土産[omiyage] present
コンピューター援用生産[konpyuutaaenyouseisan] computer-aided manufacture
安産[anzan] easy delivery
遺産[isan] inheritance

遺産相続[isansouzoku] inheritance
加工産業[kakousangyou] manufacturing industry
家産[kasan] family property
海産業[kaisangyou] marine industries
海産物[kaisanbutsu] marine products