from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Allied by derivation from the same root; having the same stem; for example, beautiful and beauteous.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Having the same root or derivation; conjugate.
- adj. Having a similar sound, but different orthography and different meaning.
from the GNU version of the Collaborative International Dictionary of English
- adj. Having the same derivation; allied radically; conjugate; -- said of certain words, as man, mankind, manhood, etc.
- adj. Having a similar sound, but different orthography and different meaning; -- said of certain words, as all and awl; hair and hare, etc.
from The Century Dictionary and Cyclopedia
- Having the same derivation; allied in origin; radically allied; conjugate: as, wise, wisely, wisdom; man, manhood, mankind.
- Having the same or a like sound, but differing in orthography and signification: as, all, awl; ball, bawl; hair, hare.
- Derived from a word in another language with some slight modification of form.
Greek parōnumos, derivative : para-, beside; see para-1 + onuma, name; see nŏ̄-men- in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)
paronym + -ous (Wiktionary)