副長【ふくちょう】
deputy head, deputy director, vice chief (of something), executive officer (navy)
副作用【ふくさよう】
side effect, adverse reaction
副社長【ふくしゃちょう】
executive vice-president
副産物【ふくさんぶつ】
by-product, spin-off, outgrowth, side effect, consequence
副会長【ふくかいちょう】
vice president (of a club, organization, etc.)
副葬品【ふくそうひん】
grave goods, burial accessories
副知事【ふくちじ】
vice-governor, deputy governor, lieutenant governor
副業【ふくぎょう】
side job, sideline, subsidiary business
副賞【ふくしょう】
extra prize
副題【ふくだい】
subtitle, subheading
副読本【ふくとくほん】
supplementary reader
副将【ふくしょう】
second in command (of an army), vice-captain, fourth athlete to compete in a 5-on-5 team competition (kendo, judo, etc.)
副官【ふくかん】
adjutant, aide, aide-de-camp
副署【ふくしょ】
countersignature
副収入【ふくしゅうにゅう】
additional income
副次的【ふくじてき】
secondary
副食【ふくしょく】
side dish, supplementary food