butan-1-ol or n-butanol or butyl alcohol - CH₃(CH₂)₃-OH / butan-2-ol or sec-butanol - CH₃CH₂CH(CH₃)-OH / 2-methyl-propan-1-ol or iso-butanol - (CH₃)₂CHCH₂-OH

plural of Helman

A room near the entrance of a building; a front room

plural of blooth