eager beaver
activist, addict, ball of fire, beaver, big-time operator, bug, busy bee, collector, demon, doer, enthusiast, faddist, fanatic, fiend, freak,
fleetingness - death, impermanence, instability, mortality, mutability, volatility
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airport - field, heliport, island, landing, port
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towing - attraction, draft, draught, draughtsman, draughty, drawing, extraction, hauling, pull, pulling, pulling power, traction, tug-of-war
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enjoy good health - bloom, flourish, glow, wear well
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cover up - act, act a part, affect, alibi, apology, apply to, assume, becloud, befog, blanket, blind, block, bluff, camouflage, canopy,
duck shot - ball, buckshot, bullet, cannonball, grapeshot, pellet, shell, shot, shrapnel, slug, tracer
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tide gauge - ebb, ebb and flow, ebb tide, flood, flood tide, flow, flux, flux and reflux, high tide, low tide, neap, reflux, rip, rip tide, tide,
theodolite - bevel, compass, gauge, protractor, quadrant, sextant, transit
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invidious - abhorrent, abominable, baleful, begrudging, bitchy, bitter, calumnious, covetous, cussed, defamatory, desirous of, detestable, detracting, distrustful, envious,
anaerobic bacteria - amoeba, anaerobe, bacillus, bacteria, bug, coccus, fungus, germ, micro-organism, microbe, mould, moulder, mouldy, pathogen, spirochaete,