- Certain non-stinging plants, mostly in the family Lamiaceae, that resemble the species of Urtica:
- Bull nettles and spurge nettles of genus Cnidoscolus:
- flame nettle or painted nettle (Coleus);
- Cnidoscolus urens, bull nettle,
- horse nettle Agastache urticifolia,
- Urera baccifera,
- small-leaved nettle (Dendrocnide photinophylla).
- Solanum elaeagnifolium, bull nettle, silver-leaf nettle, white horse-nettle;
- Especially, most species of herb genus Urtica, the stinging nettles:
- Wood nettle (Laportea canadensis);
- false nettle (Boehmeria, family Urticaceae);
- Cnidoscolus texanus, Texas bull nettle,
- hemp nettle (Galeopsis);
- Various species of the genus Dendrocnide,
- Loosely, anything which causes a similarly stinging rash, such as a jellyfish or sea nettle.
- rock nettle (Eucnide);
- ball nettle (Solanum carolinense);
- Any plant, the foliage of which is covered with stinging, mildly poisonous hairs, causing an instant rash.
- Solanum rostratum, horse-nettle;
- Urtica incisa;
- dead nettle, dumb nettle (Lamium), particularly Lamium album, white nettle;
- Cnidoscolus stimulosus, bull nettle, spurge nettle,
- hedge nettle (Stachys);
- Nettle trees or tree nettles:
- nilgiri nettle, Himalayan giant nettle (Girardinia diversifolia, family Urticaceae).
- Urtica ferox;
- Certain plants that have spines or prickles:
- Solanum dimidiatum, western horse-nettle, robust horse-nettle;
- Most, but not all, subspecies of Urtica dioica,
- (literally) Of the nettle plant and similar physical causes, to sting causing a rash in someone.
"The children were badly nettled after playing in the field."
- (figuratively) To pique, irritate, vex or provoke someone.