1998. most (det, pron, adv)
1999. mostly (adv)
2000. mother (n)
2001. motion (n)
2002. motor (n)
2003. motorcycle (n)
2004. mount (v, n)
2005. mountain (n)
2006. mouse (n)
2007. mouth (n)
2008. move (v, n)
2009. moving (adj)
2010. movement (n)
2011. movie (n)
2012. movie theater (n)
2013. Mr. (abbr)
2014. Mrs. (abbr)
2015. Ms. (abbr)
2016. much (det, pron, adv)
2017. mud (n)
2018. multiply (v)
2019. murder (n, v)
2020. muscle (n)
2021. museum (n)
2022. music (n)
2023. musical (adj)
2024. musician (n)
2025. must (modal v)
2026. my (det)
2027. myself (pron)
2028. mysterious (adj)
2029. mystery (n)
2030. nail (n)
2031. naked (adj)
2032. name (n, v)
2033. narrow (adj)
2034. nation (n)
2035. national (adj)
2036. native (adj)
2037. natural (adj)
2038. naturally (adv)
2039. nature (n)
2040. navy (n)
2041. near (adj, adv, prep)
2042. nearby (adj, adv)
2043. nearly (adv)
2044. neat (adj)
2045. neatly (adv)
2046. necessary (adj)
2047. necessarily (adv)
2048. unnecessary (adj) — > necessary
2049. neck (n)
2050. need (v, modal v, n)
2051. needle (n)
2052. negative (adj)
2053. neighbor (n)
2054. neighborhood (n)
2055. neither (det, pron, adv)
2056. nephew (n)
2057. nerve (n)
2058. nervous (adj)
2059. nervously (adv)
2060. nest (n, v)
2061. net (n)
2062. network (n)
2063. never (adv)
2064. nevertheless (adv)
2065. new (adj)
2066. newly (adv)
2067. news (n)
2068. newspaper (n)
2069. next (adj, adv, n)
2070. next to (prep)
2071. nice (adj)
2072. nicely (adv)
2073. niece (n)
2074. night (n)
2075. no (exclamation, det)
2076. No. (abbr) — also no.; >
2077. nobody (pron) — also no one
2078. nod (v)
2079. noise (n)
2080. noisy (adj)
2081. noisily (adv)
2082. non- (prefix)
2083. none (pron)
2084. nonsense (n)
2085. no one (pron) — > nobody
2086. nor (conj, adv)
2087. normal (adj, n)
2088. normally (adv)
2089. north (n, adj, adv)
2090. northern (adj)
2091. nose (n)
2092. not (adv)
2093. note (n, v)
2094. nothing (pron)
2095. notice (n, v)
2096. take notice of
2097. noticeable (adj)
2098. notion (n)
2099. novel (n)
2100. November (n) — abbr. Nov.
2101. now (adv)
2102. nowhere (adv)
2103. nuclear (adj)
2104. numerous (adj)
2105. nurse (n)
2106. nut (n)
2107. obey (v)
2108. object (n, v)
2109. objective (n, adj)
2110. observation (n)
2111. observe (v)
2112. obtain (v)
2113. obvious (adj)
2114. obviously (adv)
2115. occasion (n)
2116. occasionally (adv)
2117. occupy (v)
2118. occupied (adj)
2119. occur (v)
2120. ocean (n)
2121. o’clock (adv)
2122. October (n) — abbr. Oct.
2123. odd (adj)
2124. oddly (adv)
2125. of (prep)
2126. off (adv, prep)
2127. offend (v)
2128. offense (n)
2129. offensive (adj)
2130. offer (v, n)
2131. office (n)
2132. officer (n)
2133. official (adj, n)
2134. officially (adv)
2135. often (adv)
2136. oh (exclamation)
2137. oil (n)
2138. OK (adj, adv) — also okay
2139. old (adj)
2140. old-fashioned (adj)
2141. on (prep, adv)
2142. once (adv, conj)
2143. one (number, det, pron)
2144. one another (pron) — > each other
2145. onion (n)
2146. online (adj) — also on-line
2147. only (adj, adv)
2148. onto (prep)
2149. open (adj, v)
2150. openly (adv)
2151. opening (n)
2152. operate (v)
2153. operation (n)
2154. opinion (n)
2155. opponent (n)
2156. opportunity (n)
2157. oppose (v)
2158. opposing (adj)
2159. opposed to
2160. opposite (adj) — , adv., n.,
2161. opposition (n)
2162. option (n)
2163. or (conj)
2164. orange (n, adj)
2165. order (n, v)
2166. in order to (prep)
2167. ordinary (adj)
2168. organ (n)
2169. organization (n)
2170. organize (v)
2171. organized (adj)
2172. origin (n)
2173. original (adj, n)
2174. originally (adv)
2175. other (adj, pron)
2176. otherwise (adv)
2177. ought to (modal v)
2178. ounce (n)
2179. our (det)
2180. ours (pron)
2181. ourselves (pron)
2182. out (adv, prep) — of
2183. outdoors (adv)
2184. outdoor (adj)
2185. outer (adj)
2186. outline (v, n)
2187. output (n)
2188. outside (n) — , adj., prep.,
2189. outstanding (adj)
2190. oven (n)
2191. over (adv, prep)
2192. overall (adj, adv)
2193. overseas (adv, adj)
2194. overcome (v)
2195. owe (v)
2196. own (adj, pron, v)
2197. owner (n)