| 4 Plus | 4 Plus TV | 4 Prager Artikel |
| 4 Promille | 4 PS | 4 Quelltöpfe "Kocherlöcher" |
| 4 Real | 4 Reeves | 4 Rooms |
| 4 Schlüssel | 4 Seasons | 4 Singles |
| 4 Star | 4 Star Records | 4 Strings |
| 4 stroke | 4 Tage bis zur Ewigkeit | 4 Tage im Mai |
| 4 Tage von Dünkirchen | 4 Taste | 4 the Cause |
| 4 The Cause | 4 Times Baroque | 4 to the bar |
| 4 United | 4 Ursae Majoris | 4 Ursae Majoris b |
| 4 v. Chr. | 4 Vallées | 4 vallées |
| 4 VD 14,5/12-1 | 4 VD 14,5/12-1 SRW | 4 Voice |
| 4 Way Street | 4 World Trade Center | 4 WTC |
| 4 Yüz | 4 Your Soul | 4 zu mir! |
| 4%-Hürde | 4' 33'' | 4'-Hydroxynorendoxifen |
| 4'33 | 4'33" | 4'33'' |
| 4'8½" | 4(10)-Thujen | 4*Town |
| 4+ | 4+0-Verkehrsführung | 4+1 Sichten |
| 4+1 Sichtenmodell | 4,2-cm-leichte PaK 41 | 4,2-ka-BP-Ereignis |
| 4,2-Kilojahr-Ereignis | 4,25 mm Liliput | 4,4'-Bipyridin |
| 4,4'-Diacetamidodiphenylether | 4,4'-Diaminodiphenylether | 4,4'-Diaminodiphenylmethan |
| 4,4'-Diaminostilben-2,2'-disulfonsäure | 4,4'-Difluorbenzophenon | 4,4'-Dihydroxydiphenylsulfon |
| 4,4'-Diphenylmethandiisocyanat | 4,4'-Isobutylethylidendiphenol | 4,4'-Isopropylidenbis(2,6-dibromphenol) |
| 4,4'-Isopropylidendiphenol | 4,4'-Methylenbis(2-chloranilin) | 4,4'-Methylenbis(cyclohexylamin) |
| 4,4'-Methylenbis(N,N-dimethyl)benzolamin | 4,4'-Methylendi-o-toluidin | 4,4'-Methylendianilin |
| 4,4'-Methylendimorpholin | 4,4'-Methylendiphenyldiisocyanat | 4,4'-Oxybis(2-chlorbenzolamin) |
| 4,4'-Oxybis(benzolsulfonhydrazid) | 4,4'-Oxydianilin | 4,4'-Sulfonyldiphenol |
| 4,4'-Sulphonyldiphenol | 4,4,5,5-Tetramethyl-1,3,2-dioxaborolan | 4,4-Dimethyloxazolidin |
| 4,4′-(Hexafluorisopropyliden)diphthalsäureanhydrid | 4,4′-(Oxydiethan-2,1-diyl)dimorpholin | 4,4′-Bipyridin |
| 4,4′-Bis(dimethylamino)-4′′-(methylamino)tritylalkohol | 4,4′-Diaminobiphenyl | 4,4′-Diaminodiphenylether |
| 4,4′-Diaminodiphenylmethan | 4,4′-Diaminodiphenylsulfon | 4,4′-Diaminostilben-2,2′-disulfonsäure |
| 4,4′-Dichlordiphenylsulfon | 4,4′-Difluorbenzophenon | 4,4′-Dihydroxydiphenylsulfon |
| 4,4′-Dipyridin | 4,4′-Isobutylethylidendiphenol | 4,4′-Isopropylidendiphenol |
| 4,4′-Methylenbis(2-chloranilin) | 4,4′-Methylenbis(2-methylanilin) | 4,4′-Methylenbis(cyclohexylamin) |
| 4,4′-Methylendi-o-toluidin | 4,4′-Methylendianilin | 4,4′-Methylendianilindihydrochlorid |
| 4,4′-Methylendiphenyldiisocyanat | 4,4′-Oxybis(benzolsulfonhydrazid) | 4,4′-Oxydianilin |
| 4,4′-Sulfonyldibenzoesäure | 4,4′-Sulfonyldiphenol | 4,4′-Thiodianilin |
| 4,5 × 6 | 4,5 x 6 | 4,5-cm-Granatwerfer 176 (i) |
| 4,5-cm-KwK 184/2 (r) | 4,5-cm-KwK 184/3 (r) | 4,5-cm-KwK 184/4 (r) |
| 4,5-cm-KwK 184/5 (r) | 4,5-cm-Pak 184 (r) | 4,5-cm-Pak 184/1 (r) |
| 4,5-cm-Pak 184/6 (r) | 4,5-Dibrombrenzcatechin | 4,5-Dichlor-1,2,3-dithiazoliumchlorid |
| 4,5-Dichlor-2-octyl-2H-isothiazol-3-on | 4,5-Dichlor-2-octyl-3(2H)-isothiazolinon | 4,5-Dihydroimidazol-2-thion |
| 4,5-Dihydroxy-2-nitrobenzaldehyd | 4,5-Dihydroxynaphthalin-2,7-disulfonsäure | 4,5-Dinitrobrenzcatechin |
| 4,5-Dinitroveratrol | 4,5-Dithia-1,7-octadien | 4,5-inch-Mark-8-Schiffsgeschütz |
| 4,5mm | 4,5x6 cm | 4,6 × 30 mm |
| 4,6 × 36 mm CETME | 4,6 x 30 mm | 4,6 x 36 mm CETME |
| 4,6-Diaminoresorcin-dihydrochlorid | 4,6-Dinitro-1,3-benzendiol | 4,6-Dinitro-1,3-dihydroxybenzol |
| 4,6-Dinitro-o-kresol | 4,6-Dinitroresorcin | 4,7-cm-Festungs-PaK (t) |
| 4,7-cm-Pak (t) auf Pz.Kpfw. 35 R (f) | 4,7-cm-Pak 177 (i) | 4,7-cm-Pak 179 (j) |
| 4,7-cm-Pak 181 (f) | 4,7-cm-PaK 181(f) | 4,7-cm-PaK 185 (b) |
| 4,7-cm-Pak 187 (h) | 4,7-cm-Pak 196 (r) | 4,7-cm-Pak 36 (t) |
| 4,7-cm-PaK 36(t) | 4,7-cm-PaK Böhler | 4,7-cm-Tunul Antitanc Mod. 1935 |
| 4,7-cm-Tunul Antitanc Mod. 1939 | 4,7-Dichlorchinolin | 4,73 × 33 mm |
| 4,73 x 33 mm | 4- | 4-%-Hürde |
| 4-(1,1,3,3-Tetramethylbutyl)phenol | 4-(1,1-Dimethylethyl)phenol | 4-(1,1-Dimethylpropyl)phenol |
| 4-(1-Pyrrolidinyl)pyridin | 4-(2,4-Dichlor)phenoxybutansäure | 4-(2,4-Dichlorphenoxy)buttersäure |
| 4-(2-Aminoethyl)benzolsulfonylfluorid | 4-(2-Pyridylazo)resorcin | 4-(4-Acetoxyphenyl)butan-2-on |
| 4-(4-Hydroxy-4-methylpentyl)cyclohex-3-en-1-carbaldehyd | 4-(4-Hydroxyphenyl)butan-2-on | 4-(4-Isopropoxyphenylsulfonyl)phenol |
| 4-(4-Isopropyloxyphenylsulfonyl)phenol | 4-(4-Isothiocyanatophenylazo)-N,N-dimethylanilin | 4-(4-Methoxyphenyl)-2-butanon |
| 4-(4-Methoxyphenyl)butan-2-on | 4-(Aminomethyl)benzoesäure | 4-(Dimethylamino)azobenzol-4′-isothiocyanat |
| 4-(Dimethylamino)pyridin | 4-(Indol-3-yl)buttersäure | 4-(Methylamino)phenolsulfat |
| 4-(p-Hydroxyphenyl)butan-2-on | 4-0-2 System | 4-0-2-System |
| 4-0-4 | 4-0-System | 4-2-1-Konzept |
| 4-2-1-Strategie | 4-2-2 | 4-2-4 |
| 4-2-System | 4-20 mA | 4-3 Defense |
| 4-3-2-1 Hot & Sweet | 4-4-0 | 4-4-0T |
| 4-4-2 | 4-4-2 (Lokomotive) | 4-5-6 |
| 4-6 The Gyles | 4-6-0 | 4-6-2 |
| 4-6-4 | 4-6-6-4 | 4-72-Colombia |
| 4-8-0 | 4-8-2 | 4-8-4 |
| 4-Acetoxy-2-azetidinon | 4-Acetoxy-DMT | 4-AcO-DMT |
| 4-Allyl-2-methoxy-phenol | 4-Allylanisol | 4-Allylbrenzcatechin-2-methylether |
| 4-Allyloxy-3,5-dimethoxy-1-ethylamin | 4-Allyloxy-3,5-dimethoxy-phenethylazan | 4-Allylphenol |
| 4-Allyphenol | 4-Amino-1-benzolsulfonsäure | 4-Amino-1-butanol |
| 4-Amino-1-hydroxybutyliden-Diphosphonsäure | 4-Amino-2(1H)-pyrimidinon | 4-Amino-2-(trifluormethyl)benzonitril |
| 4-Amino-2-hydroxypyrimidinon | 4-Amino-2-nitrophenol | 4-Amino-5-hydroxynaphthalin-2,7-disulfonsäure |
| 4-Amino-6-chlor-1,3-benzoldisulfonamid | 4-Aminoacetanilid | 4-Aminoanisol |
| 4-Aminoazobenzol | 4-Aminobenzaldehyd | 4-Aminobenzoesäure |
| 4-Aminobenzoesäure-ethylester | 4-Aminobenzoesäureethylester | 4-Aminobenzolsulfonsäure |
| 4-Aminobenzolthiol | 4-Aminobenzonitril | 4-Aminobenzotrifluorid |
| 4-Aminobenzylalkohol | 4-Aminobiphenyl | 4-Aminobutansäure |
| 4-Aminobuttersäure | 4-Aminodiphenyl | 4-Aminodiphenylamin |
| 4-Aminohippursäure | 4-Aminonaphthalin-1-sulfonsäure | 4-Aminophenol |
| 4-Aminopyridin | 4-Aminosalicylsäure | 4-Aminothiophenol |
| 4-Aminotoluol | 4-Anilino-4'-nitroazobenzol | 4-Anisidin |
| 4-Augen-Prinzip | 4-Azaphenothiazin | 4-Ämter-Lehre |
| 4-BBN | 4-Benzoyl-L-phenylalanin | 4-Berge-Schischaukel |
| 4-Berge-Skischaukel | 4-Bit | 4-Bit-Architektur |
| 4-Brom-2,5-dimethoxyphenylethylamin | 4-Brom-2-chlorthiophen | 4-Bromamphetamin |
| 4-Bromanilin | 4-Bromanisol | 4-Brombenzaldehyd |
| 4-Brombenzoesäure | 4-Brombenzolsulfonsäure | 4-Brombenzonitril |
| 4-Brombenzylalkohol | 4-Brombiphenyl | 4-Brombrenzcatechin |
| 4-Bromfluorbenzol | 4-Bromiodbenzol | 4-Bromisochinolin |
| 4-Bromphenol | 4-Brompyridin | 4-Bromresorcin |
| 4-Bromtoluol | 4-Butanolid | 4-Butyl-1,2-diphenyl-3,5-pyrazolidindion |
| 4-Butyl-1,3-benzoldiol | 4-Butyrolacton | 4-CA |
| 4-Carboxybenzaldehyd | 4-Carvomenthenol | 4-Chlor-1-naphthol |
| 4-Chlor-2-(2-(2-chlorphenoxy)acetamido)benzoesäure | 4-Chlor-2-methylanilin | 4-Chlor-2-nitroanilin |
| 4-Chlor-2-nitrophenol | 4-Chlor-2-nitrotoluol | 4-Chlor-3-methylphenol |
| 4-Chlor-7-nitro-2,1,3-benzoxadiazol | 4-Chlor-7-nitrobenzo-2-oxa-1,3-diazol | 4-Chlor-7-nitrobenzofurazan |
| 4-Chlor-o-phenylendiamin | 4-Chlor-o-toluidin | 4-Chlor-o-toluidiniumchlorid |
