What are some uncommon but valid portmanteau words that people use?

Solution 1:

Here are a few that have entries in the Merriam-Webster Online dictionary:

  • advertorial (advertisement + editorial)
  • agitprop (agitation + propaganda) [originally from Russian]
  • alphanumeric (alphabetic + numeric)
  • avionics (aviation + electronics)
  • beefalo (beef + buffalo)
  • biopic (biographical + motion picture)
  • bit (binary + digit)
  • blaxploitation (blacks + exploitation)
  • Bollywood (Bombay + Hollywood)
  • brunch (breakfast + lunch)
  • cablecast (cable + broadcast)
  • carjack (car + hijack)
  • chortle (chuckle + snort)
  • cineplex (cimena + complex)
  • codec (coder + decoder)
  • digerati (digital + literati)
  • docudrama (documentary + drama)
  • dramedy (drama + comedy)
  • ebonics (ebony + phonics)
  • edutainment (education + entertainment)
  • emoticon (emotion + icon)
  • fantabulous (fantastic + fabulous)
  • franglais (français + anglais) [french][french]
  • Frankenfood (Frankenstein + food)
  • freeware (free + software)
  • frenemy (friend + enemy)
  • gaydar (gay + radar)
  • ginormous (gigantic + enormous)
  • guesstimate (guess + estimate)
  • infomercial (information + commercial)
  • infotainment (information + entertainment)
  • liger (lion + tiger)
  • malware (malicious + software)
  • meld, meaning merge or blend (melt + weld)
  • mockumentary (mock + documentary)
  • modem (modulator + demodulator)
  • moped (motor + pedal)
  • motel (motor + hotel)
  • napalm (naphthene + palmitate)
  • netizen (net + citizen)
  • newscast (news + broadcast)
  • pixel (picture + element)
  • radome (radar + dome)
  • redox (reduction + oxidation)
  • shareware (share + software)
  • simulcast (simultaneous + broadcast)
  • sitcom (situation + comedy)
  • skort (skirt + shorts)
  • skyjack (sky + hijack)
  • smog (smoke + fog)
  • soundscape (sound + landscape)
  • Spanglish (Spanish + English)
  • squiggle (squirm + wriggle)
  • stagflation (stagnation + inflation)
  • sysop (system + operator)
  • tangelo (tangerine + pomelo)
  • televangelist (television + evangelist)
  • thermistor (thermal + resistor)
  • tigon (tiger + lion)
  • transceiver (transmitter + receiver)
  • transponder (transmitter + responder)
  • vlog (video + blog)
  • voxel (volume + pixel)
  • webisode (web + episode)

Solution 2:

Lewis Carrol made this into an art form. One of my favorites from "Alice in Wonderland" was "Frumious" it is a combination of "Fuming" and "Furious"

Solution 3:

spork

Solution 4:

Crocoduck

The crocoduck denotes an hybrid animal with the head a of crocodile and the body of a duck, which became recurrent in debates involving creationists and proponents of evolution, being used as a symbol directed at those who do not understand the basic principles of evolution.