kawa

is protocol or etiquette in a Maori tribal meeting place (lexic.us).

Variations: kawa, kawas.

meg

is short for 'megabyte'.

Variations: meg, megs.

chunnel

is the railroad tunnel between France and England under the English Channel (WordNet).

Variations: chunnel, chunnels.

myc

is an oncogene that aids the growth of tumorous cells.

Variations: myc, mycs.

acton

is 'a stuffed jacket worn under the mail, or (later) a jacket plated with mail' (lexic.us).

Variations: acton, actons.

neap

is a less than average tide occurring at the first and third quarters of the moon (WordNet).

Variations: neap, neaps.

jann

is an alternative spelling of jinni, an invisible spirit mentioned in the Koran and believed by Muslims to inhabit the earth and influence mankind by appearing in the form of humans or animals (lexic.us).

Variations: jann, janns.

sade

is one of the many spellings for the 18th letter of the Hebrew alphabet (Wiktionary).

Variations: sade, sades, sadhe, sadhes, sadi, sadis, tsade, tsades, tsadi, tsadis.

stime

is a slight gleam or glimmer (lexic.us).

Variations: stime, stimed, stimes.

idem

is something that has been mentioned previously, the same (TheFreeDictionary).

Variations: idem.

stim

means 'a very small amount' (lexic.us). It can also mean 'any of various repetitive actions, such as flapping the hands, wiggling the knees, shining a light into one's eye, and spinning in a chair, typically performed by autistic people' (Wiktionary). According to Wiktionary, it can also be used as a verb meaning to perform one of these actions. However, the inflected verbal forms (stimmed, stimming) are not currently in SOWPODS.

Variations: stim, stims.