Similar words: allergy, allergic, emergent, detergent, divergent, emergency, emergence, divergence. Meaning: ['ælədʒen] 
n. any substance that can cause an allergy.
n. any substance that can cause an allergy. 
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61. Long - term exposure to this medicine may sensitize you to the allergen.
More similar words: allergy, allergic, emergent, detergent, divergent, emergency, emergence, divergence, convergent, convergence, emergencies, overgenerous, emergency exit, laundry detergent, intergenerational, verge, merge, serge, emerge, merger, clergy, diverge, submerge, converge, sergeant, energetic, submerged, synergetic, concierge, clergyman.