| carpal | (noun) any of the eight small bones of the wrist of primates | Synonyms: carpal bone, wrist bone |
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| copal | (noun) a brittle aromatic resin used in varnishes | - |
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| metacarpal | (noun) any bone of the hand between the wrist and fingers | Synonyms: metacarpal bone |
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| nopal | (noun) any of several cacti of the genus Nopalea resembling prickly pears | - |
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| (noun) cactus having yellow flowers and purple fruits | Synonyms: Opuntia lindheimeri |
| opal | (noun) a translucent mineral consisting of hydrated silica of variable color; some varieties are used as gemstones | - |
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| pal | (noun) a close friend who accompanies his buddies in their activities | Synonyms: brother, buddy, chum, crony, sidekick |
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| pipal | (noun) fig tree of India noted for great size and longevity; lacks the prop roots of the banyan; regarded as sacred by Buddhists | Synonyms: bo tree, Ficus religiosa, peepul, pipal tree, pipul, sacred fig |
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| principal | (noun) the educator who has executive authority for a school | Synonyms: head, head teacher, school principal |
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| (noun) an actor who plays a principal role | Synonyms: lead, star |
| (noun) the major party to a financial transaction at a stock exchange; buys and sells for his own account | Synonyms: dealer |
| (noun) (criminal law) any person involved in a criminal offense, regardless of whether the person profits from such involvement | - |
| (noun) the original amount of a debt on which interest is calculated | - |
| (noun) capital as contrasted with the income derived from it | Synonyms: corpus, principal sum |
| sepal | (noun) one of the green parts that form the calyx of a flower | - |
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| tepal | (noun) an undifferentiated part of a perianth that cannot be distinguished as a sepal or a petal (as in lilies and tulips) | - |
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