1. (n.) A bugbear; anything which terrifies.

2. (n.) A general name applied to various insects belonging to the Hemiptera; as, the squash bug; the chinch bug, etc.

3. (n.) An insect of the genus Cimex, especially the bedbug (C. lectularius). See Bedbug.

4. (n.) One of various species of Coleoptera; as, the ladybug; potato bug, etc.; loosely, any beetle.

5. (n.) One of certain kinds of Crustacea; as, the sow bug; pill bug; bait bug; salve bug, etc.

ALGOL COBOL FORTRAN Mumbo Jumbo abrade addict addle addle the wits adenovirus aerobe aerobic bacteria aficionado aggravate agitate alphabetic data alphanumeric code amoeba anaerobe anaerobic bacteria angular data annoy apply pressure arachnid arthropod assembler attend attend to auscultate bacillus bacteria bacterium badger bag bait ball up balloon be all ears be at becloud bedazzle bedevil beetle befuddle belly belly out bend an ear beset besiege bewilder bigot bilge billow binary digit binary scale binary system bit blandish blemish bogey bogeyman boggart bogle booger boogerman boogeyman bother bouge bristle brown off buff bugaboo bugbear bugger bulge bullyrag burn up buttonhole byte cajole carp at case catch caterpillar centipede chafe chilopod chivy cloud coax coccus cock the ears collector command pulses commands compiler computer code computer language computer program confuse control signals controlled quantity convulse correcting signals crack crank craze crazy fancy daddy longlegs data daze dazzle defect defection deficiency demon devil devotee dilate diplopod discombobulate discomfit discompose disconcert disease-producing microorganism disorganize disorient distemper distend distract disturb dog drawback dun eager beaver eavesdrop echovirus embarrass embroil energumen entangle enterovirus enthusiasm enthusiast error error signals examine by ear exasperate exercise exert pressure faddist failing failure fan fanatic fanatico fascination fash fault faute fee-faw-fum feedback pulses feedback signals fiend film data filterable virus flaw flummox flurry fluster flutter fly fog foible frailty freak fret fret at fuddle fungus furor furore fuss fuss at gall germ get give attention give audience to give ear goggle gram-negative bacteria gram-positive bacteria great one for gripe harass hark harry harvestman hassle hear hear out hearken heckle hector heed henpeck hexadecimal system hexapod hobbyist hole hound imperfection importune inadequacy infatuate infatuation infirmity information input data input quantity insect instructions intercept irk kink larva lend an ear listen listen at listen in listen to little problem lunatic fringe machine language maggot make a reconnaissance mania maniac manic-depressive psychosis maze message microbe microorganism microphone miff mike millepede millipede mist mite mix up moider mold molest