姥桜[ubazakura] faded beauty
山姥[yamauba] mountain witch
姥捨て[ubasute] practice of abandoning old women (practise)
姥捨て山[ubasuteyama] mountain where old women were abandoned
姥貝[ubagai] Sakhalin surf clam (Pseudocardium sachalinense)

姥鮫[ubazame] basking shark (Cetorhinus maximus)
姥目樫[ubamegashi] ubame oak (Quercus phillyraeoides)
姥彼岸[ubahigan] double weeping rosebud cherry (Prunus pendula)
姥魚[ubauo] Aspasma minima (species of clingfish)

偏芯[henshin] eccentricity (in mechanics, electronics, etc.)
燈芯[toushin] (lamp) wick
帯芯[obishin] thick obi sash
摘芯[tekishin] thinning (buds and branches)
芯地[shinji] padding

替え芯[kaeshin] spare lead
鉛筆の芯[enpitsunoshin] lead of a pencil
硬の芯[kounoshin] hard pencil lead
林檎の芯[ringonoshin] core of an apple