| INTERBEHAVIOR | • INTERBEHAVIOR n. the behaviour of interaction between organisms, also INTERBEHAVIOUR. | 
| INTRAVERSABLE | • intraversable adj. Not traversable. • INTRAVERSABLE adj. that cannot be traversed.
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| INVERTEBRATES | • invertebrates n. Plural of invertebrate. • INVERTEBRATE n. an animal lacking a spinal column.
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| OVERBEARINGLY | • overbearingly adv. In an overbearing manner. • OVERBEARING adv. OVERBEAR, to bring down by superior force.
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| OVERBREATHING | • overbreathing v. Present participle of overbreathe. • overbreathing n. Hyperventilation.
 • overbreathing n. Excessive breathing.
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| OVEREXUBERANT | • overexuberant adj. Excessively exuberant. • OVEREXUBERANT adj. excessively exuberant.
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| REVERBERANTLY | • reverberantly adv. In a reverberant manner. • REVERBERANT adv. tending to reverberate.
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| REVERBERATING | • reverberating v. Present participle of reverberate. • REVERBERATE v. to continue in or as if in a series of echoes, to resound, also REVERB.
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| REVERBERATION | • reverberation n. A violent oscillation or vibration. • reverberation n. An echo, or a series of overlapping echoes.
 • reverberation n. The reflection of light or heat; a reflection in, or as though in, a mirror.
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| UNRECOVERABLE | • unrecoverable adj. Not recoverable; that cannot be recovered. • unrecoverable adj. From which recovery is not possible.
 • UNRECOVERABLE adj. that cannot be recovered.
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| UNRECOVERABLY | • unrecoverably adv. In an unrecoverable manner, or to an unrecoverable degree. • UNRECOVERABLE adv. that cannot be recovered.
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| UNREPRIEVABLE | • unreprievable adj. Not capable of being reprieved. • UNREPRIEVABLE adj. not reprievable.
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| UNTRAVERSABLE | • untraversable adj. That cannot be traversed. • UNTRAVERSABLE adj. not traversable.
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| VERBIGERATING | • verbigerating v. Present participle of verbigerate. • VERBIGERATE v. to continually repeat a word or phrase, usually unconsciously.
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| VERBIGERATION | • verbigeration n. An obsessive repetition of meaningless words and phrases, especially as a symptom of mental illness. • VERBIGERATION n. the obsessive repetition of stereotyped phrases.
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| VERTEBRATIONS | • VERTEBRATION n. division into vertebrae. |