Synonyms to tunneling

deepening, accelerando, acceleration, aggravation, amplification, annoyance, augmentation, beefing-up, blowing up, blowup, concentration, condensation, consolidation, contentiousness, deliberate aggravation, depression, deterioration, digging, drilling, embittering, embitterment, enhancement, enlargement, exacerbation, exaggeration, exasperation, excavation, explosion, heating-up, heightening, increase, information explosion, intensification, irritation, lowering, magnification, mining, pickup, population explosion, probing, provocation, redoubling, reinforcement, sharpening, sinkage, sinking, souring, speedup, step-up, strengthening, tightening, worsening, Schmerz, Slough of Despond, abatement, abridgment, abstraction, abulia, aching heart, agony, agony of mind, alienation, alleviation, alveolation, alveolus, anguish, antrum, anxiety, anxiety equivalent, anxiety state, apathy, armpit, attenuation, bad times, bale, basin, bitterness, blank despondency, blaze, bleakness, bleeding heart, blues, boom, bottoming out, bowl, broken heart, business cycle, business fluctuations, bus