• steup,
• msrp,
• stap,
• stpo,
• sdps,
• esop,
• clp,
• asmp,
• etm,
• vap,
• bep,
• btm,
• dts,
• ett,
• etz,
• nep,
• mip,
• lti,
• mtc,
• otg

• stave,
• stipe,
• stoep,
• stub,
• staab,
• STAPP,
• stuff,
• stove,
• stab,
• stiff,
• steppe,
• step,
• staph,
• steep,
• Steve,
• stief,
• staub,
• staff,
• stoup,
• stop,
• stob,
• steib,
• stoop.

The plural form of "stp" is "stps"

The singular form of the word "stp" is "step"